Jdj cartridges

Notes: The .375 JDJ is made by simply running a .444 case through the .375 JDJ full length sizing die. The .375 is exceptionally easy to make. No fireforming is necessary. In loading this cartridge disregard the cannalure. Seat the 220s, 260s, 270s, and 285s with the base of the bullet seated to the end of the neck.

Wildcat Cartridges. .375 JDJ. column By: Layne Simpson | October, 20. The .375 JDJ was introduced in 1978 and was the first of six cartridges eventually developed on the .444 …Carpe Diem. 772 posts · Joined 2005. #7 · Aug 30, 2021. The 7-30 JDJ was named that because….it is based on the 7-30 Waters case. The .444 case was used for appropriate calibers greater than 7mm, smaller ones were usually on the .225 Winchester case.This cartridge was innovative and effective, but would become obsolete by the end of the war, and no serious effort was made to continue making Burnside carbines ... “Fat Mac” – SSK Industries’ .950 JDJ Rifle. Related Articles. Aircraft MGs British .303 Browning Mk II* Aircraft Machine Gun October 19, 2021 Ian McCollum ...Understanding 950 Jdj Cartridge Overview Of 950 Jdj Cartridge History. The 950 jdj cartridge was created by j. d. Jones in 1994. It is a straight-walled cartridge with a rim and was designed for use in the thompson center arms contender single-shot rifle. It is a massive cartridge, with a case length of 2. 5 inches and a bullet diameter of. 950 ...Instead of a 375 JDJ on your Encore, how about just getting a 375 H&H barrel for it? That way you're not trying to "hot rod" a cartridge past it's design and turn it into something it was never intended to be. There's plenty of room in the H&H chambering to give you (hopefully) anything you're looking for, and do it with proven safe load data.rare and hard to find 16.25 375 jdj super sixteen contender rifle barrel – t/c thompson center stainless steel – front sight present – rear sight present – lightly used beautiful hard hitting stainless steel rifle barrel. chambered in the wildcat 375 jdj cartridge. 16.25 oal stainless steel heavy bull barrel – bore is sharp and prominent. The several offhand targets with the shooter having to move was my contribution, and quickly done away with. Between hunting and IHMSA I decided to make up some cartridges—the 6.5, 7mm, and .375 JDJ reamers were ordered at the same time and the barrels all came together at the same time. Rock Island Auction Company has released a video where they shoot some of the largest non-military cartridges and rifles ever produced. The three calibers include the .700 Nitro Express, 4 bore and .950 JDJ. And if you are going to shoot this kind of hand cannons, then you first need to warm up with some low recoiling cartridges like 12 …

6.5 JDJ / 6.5mm JDJ Handgun Data (Using Nosler Bullets) Warning! Notes: handgun: barrel: SSK Industries Contender; length: 14"; twist: 1-9"; case: Winchester (.225 Win.); primer: Rem. 9 1/2; bullets: 100 and 120 grain Nosler Solid Base Ballistic Tip (brown) and 100 and 125 grain Nosler Partition Spitzer; use maximum loads with caution Be Alert: …Cartridge Data Published On: January 27, 2015 at 11:32 pm by Bullet-Blog and last updated on January 27, 2015 at 11:32 pm Aliases .226 JD Jones, .226 SSK Summary The .226 JDJ (AKA: .226 JD Jones, .226 SSK) is a Center Fire cartridge with a Bullet Diameter of 0.224 in” (5.69mm) that is primarily usedSubscribed. 35K. 3M views 6 years ago. Made by SSK Industries, the .950 JDJ is the largest sporting rifle made. The cartridge began as a 20mm Vulcan round, …Re: encore 375 JDJ data. « Reply #1 on: July 26, 2011, 12:15:35 AM ». All you need is Contender data. If you know how to reload and know pressure signs, all you need is a starting point. It's up to you, the hopefully competent reloader, to determine the maximum load in your gun. Logged.The .950 JDJ is one of the most powerful rifle cartridges ever developed in the area of sporting rifles. It was designed by gunsmith and firearm designer J.D. Jones of SSK Industries, who it is named …

The .950 JDJ is an extremely powerful, large-caliber rifle cartridge. The bullet is based on the 20×102mm Vulcan cartridge used in the M61 Vulcan cannon. The .950 JDJ is most notably used in the SSK .950 rifle.6.5 JDJ / 6.5mm JDJ Handgun Data (Using Nosler Bullets) reloading data with 36 loads. Using bullets from Nosler. Powders include Accurate, IMR, Alliant, Winchester, Hodgdon, Vihtavuoricreations of SSK), the 309 JDJ was developed from a quite diff erent cartridge than others in the series. Rather than start from the 30 Luger, the 30 Mauser, or the 221 Remington Fireball, the 309 JDJ is based on the 444 Marlin case necked down to 30 caliber. Given the greater powder capacity of the 309 JDJ relative to its 30 caliberI would suggest .309 JDJ data as a starting point, then work up in the Encore. .30 Bellm is a sawed off .444 Marlin case 1.395″ long necked to .30 caliber, designed specifically for Illinois handgun deer hunting, which is restricted to cartridges 1.4″ long or less, must be .30 cal. or larger, and produce at least 500 ft/lbs muzzle energy ...

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Sep 1, 1999 · I would suggest .309 JDJ data as a starting point, then work up in the Encore. .30 Bellm is a sawed off .444 Marlin case 1.395″ long necked to .30 caliber, designed specifically for Illinois handgun deer hunting, which is restricted to cartridges 1.4″ long or less, must be .30 cal. or larger, and produce at least 500 ft/lbs muzzle energy ... When it comes to keeping your Hewlett Packard printer running smoothly, choosing the right ink cartridge is crucial. With so many options available, it can be overwhelming to deter...The item “SSK Industries 257 JDJ Caliber Barrel for Thompson Center Contender (#1900)” is in sale since Friday, June 15, 2018. This item is in the category “Sporting Goods\Hunting\Gun Parts\Pistol”. The seller is “singer45acp” and is located in Anaheim, California. This item can be shipped to United States. The 14.5mm JDJ was created by SSK Industries of Wintersville, Ohio. Overview. It uses the .50 BMG case with the neck opened up to accept a .585 in (14.9 mm) bullet. It fires the 1,173-grain (76.0 g) bullet at 2,700 ft/s (820 m/s) with the fire-formed load. The Barnes 750-grain (49 g) bullet can also be loaded to 3,000 ft/s (910 m/s). SSK is also the home of the Whisper and JDJ series of handgun and rifle cartridges. Once strictly wildcats, Whisper and JDJ ammo can be bought from Cor - Bon ...Instagram https://www.instagram.com/jones.beene - @jones.beeneJones Beene, of Knight Rifles & Lead Guitarist for Calling Glory, shooting the largest center-f...

The biggest bullet caliber is the .950 JDJ, a custom-made rifle cartridge developed by the American firearms company SSK Industries. It is designed to be one of the largest and most powerful rifle cartridges in existence. What is the most powerful bullet caliber? The .950 JDJ is considered one of the most powerful rifle cartridges in the world.6.5 JDJ / 6.5mm JDJ. Warning! Notes: All loads were developed in an SSK Industries 14-inch barrel. Cases were formed from virgin .225 Winchester brass and Winchester standard primers were used. Maximum loads shown were safe in the test gun but may be excessive in other guns. Do not try any load without first decreasing the powder charge by ten ...22 Mar 2014 ... 375 JDJ. 14K views · 10 years ago ...more. Kasper Eklöf. 15 ... Top 3 T/C Encore Big Game Hunting Cartridges! MatchGrade Machine.Leland CO2 Cartridges. Quantity: 50 Leland 8 Gram CO2 Cartridges. $25.00. QTY. Featured Products. RSA (REAR SLING ATTACHMENT) $75.00. Free Shipping! … This cartridge was developed by JD Jones that actually started out as the 411 Whammy. Reason being that at that stage there were a good variety of .411 cal bullets available in the US as opposed t the 416. With the resurgence of the 416 Rigby, quality bullets became available and the 411 was necked up to .416 and originally called the 416 JDJ. JD Jones, a legend in cartridge development and barrel making, was the brain behind the .950 JDJ’s design. This massive round, fashioned from a 20 mm Vulcan Cannon round, delivers a staggering 38,000 foot-pounds of force, nearly triple that of a 50 BMG. SEE ALSO: California’s SB 1160: Annual Gun Registration or Face $1,000+ Fines358 JDJ. The 358 JDJ was designed by JD Jones of SSK Industries and is based on the 444 Marlin case.JD Jones’ .950 JDJ cartridge is a generally described as the largest sporting rifle cartridge ever produced, producing more energy than even the 4-bore cartridges that match it in bore diameter. Only three of these rifles were made, and the original loading was a 2600 grain (168g) cast bullet moving at 2200 fps (670m/s), for a …The 6.5-284 Norma was once regarded as the highest performing 6.5 mm cartridge, however it has been unseated from this position due to the popularity and improved ballistic performance of the 6.5 PRC. However, the Norma cartridge is still an excellent option for long range target shooting as well as long range hunting.Printing has become an essential part of our daily lives, whether it’s for personal or professional use. However, the cost of printer cartridges can add up quickly, especially if y...Here is our comprehensive reference chart showing which cartridges use which shell holders from the various manufacturers like Lee, Lyman, RCBS and Hornady. We decided to include multiple brands of shell holder, so that if your store doesn’t for example sell Hornady shell holders or the one you are looking for is sold out and you …13 Feb 2011 ... I see where someone else already mentioned the JDJ cartridges and for wildcats out of the Encore they'd be really hard to beat. I have been ...

If you are looking for extra “knock down power”, you might consider one of the newest JDJ cartridges – 222 JDJ Magnum. This is a blown out 222 magnum case ...

A leaking monobloc tap can be repaired using a screwdriver and a wrench. However, monobloc taps are unique because they use a ceramic cartridge, rather than a rubber washer or cera...Rock Island Auction Company has released a video where they shoot some of the largest non-military cartridges and rifles ever produced. The three calibers include the .700 Nitro Express, 4 bore and .950 JDJ. And if you are going to shoot this kind of hand cannons, then you first need to warm up with some low recoiling cartridges like 12 …For as long as I can remember I have been handloading and shooting many popular wildcats, like the .357 Herrett, 7mm TCU, .243 AI, .280 AI, .300 Whisper, .375 JDJ, and several others. I learned about case forming and load development by working with these cartridges, often in the very early years when there was little available data.309 JDJ SSK-50 / Contender 22 Inch Barrel with TSOB Scope Base and Thread Protector. SKU. C8014. Be the first to review this product. $387.90. Add to Cart. Specifications. Specifications. Gun Model. 950 JDJ. The 950 JDJ was designed by J.D. Jones from SSK Industries in 1996 and was based on the 20mm Vulcan case that was shortened and necked down. The SSK Industries Fatmac Rifle that was featured on Rock Island Auctions. Made by SSK Industries on a McMillan action, the .950 JDJ is the largest sporting rifle made. The cartridge began as a 20mm Vulcan round, cut down to 70mm case length and necked up to 24mm (.95 caliber). It required a special sporting purposes exemption form the ATF to not be classified as a destructive device under the NFA. It’s a pretty ...JD Jones’ .950 JDJ cartridge is a generally described as the largest sporting rifle cartridge ever produced, producing more energy than even the 4-bore cartridges that match it in bore diameter. Only three of these rifles were made, and the original loading was a 2600 grain (168g) cast bullet moving at 2200 fps (670m/s), for a …

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Here you have the 950 JDJ. The case is made of a 20mm Vulcan case shortened to 4 inches and necked up to 95 caliber. It is not considered a destructive device by the ATF. The 950 JDJ came to life in 1996 by JD Jones but sadly is no longer in production. With the individual hand turned bronze bullets costing $10 a piece and a live cartridge ...The cartridge is based on the 444 Marlin case necked down to hold a .375 caliber bullet. The 220 grain flat point bullets can be propelled as fast from the .375 JDJ as from the .375 Winchester big bore, making it an effective game cartridge. The 270 grain bullet can reach up to 2000 fps while three powders produced 1900 fps with the 300 grain ...All of these types of custom rounds belong in a 14" or longer barrel. 1) Starting from a .30 Herrett barrel, rechamber to .30/30 Improved or .30 Alaskan. 2) Starting from a .30/30 barrel, rechamber to .308 Bellm. 3) .309 JDJ and its case capacity do not belong in a Contender barrel, handgun or rifle, in spite of SSK's hype to the contrary, but ...950 jdj. $225.00. Quantity. Add to Cart. .950 JDJ cases are approximately 70 mm in length, and are based on a 20x110mm case shortened and necked up to accept the .950 in (24.1 mm) bullet. Projectiles are custom-made and most commonly weigh 3,600 grains (230 g) which is 8.2 oz. or over half a pound. This piece is pretty big. 2x2x6. This cartridge was developed by JD Jones that actually started out as the 411 Whammy. Reason being that at that stage there were a good variety of .411 cal bullets available in the US as opposed t the 416. With the resurgence of the 416 Rigby, quality bullets became available and the 411 was necked up to .416 and originally called the 416 JDJ. Gun: Douglas; barrel length: 14"; primer: FC 210; case: Rem; max length: 2.205"; trim length: 2.195". Be Alert: Publisher cannot be responsible for errors in published load data. Wt. .309 JDJ (Accurate Loading Guide #2) reloading data with 18 loads. Using bullets from Nosler BT. Powders include Accurate.Meet the .950 JDJ. When it comes to a rifle cartridge, nothing is larger than the .950 JDJ, which uses 240 grains of powder to push a 2,400-grain bullet at 2,100 feet per second (FPS). In addition to being the largest caliber on the market today, it has also been measured as generating 277 foot-pounds of recoil, or approximately 10 times as much as …Designed. 1990s. Manufacturer. SSK Industries. The Whisper family of firearm cartridges is a group of wildcat cartridges developed in the early 1990s by J.D. Jones at SSK Industries. The Whisper family was developed as a line of accurate, multi-purpose cartridges using relatively heavy rifle bullets for a given caliber in subsonic loads.Firing custom 2,400- to 3,600-grain bullets and reportedly matching the power of a World War I tank round, the SSK .950 JDJ is considered by many to be the world’s largest (movable) rifle cartridge.Reduce all loads 10 percent and work up only as pressure signs permit. (From Handloader Issue 153) Be Alert: Publisher cannot be responsible for errors in published load data. Wt. .358 JDJ reloading data with 26 loads. Using bullets from Hornady SP, Hawk SP, Speer Flat SP, Nosler Partition, Sierra spitzer BT, Hawk SP .9 Aug 2021 ... ... 23:22 · Go to channel · The 950 JDJ FAT MAC (The World's Most Powerful Rifle!!!) Kentucky Ballistics•2.5M views · 38:26 · Go to c... ….

Re: encore 375 JDJ data. « Reply #1 on: July 26, 2011, 12:15:35 AM ». All you need is Contender data. If you know how to reload and know pressure signs, all you need is a starting point. It's up to you, the hopefully competent reloader, to determine the maximum load in your gun. Logged.The Whisper family of firearm cartridges is a group of wildcat cartridges developed in the early 1990s by J.D. Jones at SSK Industries.The Whisper family was developed as a line of accurate, multi-purpose cartridges using relatively heavy rifle bullets for a given caliber in subsonic loads. The intention was to create an extremely accurate cartridge family for … Crafted from a 20×102mm Vulcan cannon case, shortened and necked up to fit a .950 inch (24.1 mm) bullet, the .950 JDJ is a cartridge that redefines large caliber. The projectiles for this ... Nov 4, 2008 · From the data I have on these 3 cartridges it looks like the 7X30 JDJ (aka 7-30 Waters Improved) will do anything the other two cartridges will do in a Contender but with less powder and less recoil. If you were going to have my barrel rechambered for a 7mm Cartridge which would be your choice and why. Instagram https://www.instagram.com/jones.beene - @jones.beeneJones Beene, of Knight Rifles & Lead Guitarist for Calling Glory, shooting the largest center-f...The item “RARE 375 JDJ SUPER SIXTEEN STAINLESS T/C CUSTOM SHOP CONTENDER RIFLE BARREL” is in sale since Sunday, June 9, 2019. This item is in the category “Sporting Goods\Hunting\Gun Parts\Rifle”. The seller is “losangelescowboy” and is located in Sherman Oaks, California. This item can be shipped to United States.The .950 JDJ (shown here next to 5.56mm and 9mm cartridges) was based on the 20x110mm Vulcan Cannon cartridge, shortened, and necked up to match a .950 caliber (24.1mm) cast lead bullet. The original loading was a 2600 grain (168g) cast bullet moving at 2200 fps (670m/s), for a whopping 28,000 foot-pounds of muzzle energy.14 Jan 2024 ... In this video I compare the newest and greatest cartridges to the old cartridges ... The 950 JDJ FAT MAC (The World's Most Powerful Rifle!!!).Cartridge Fitment The designated Cartridge or Fixed Ammunition that the Barrel is chambered to accept. Ex: 44 Magnum. 257 JDJ ... Reviews. Write Your Own Review. You're reviewing: Die Set: 257 JDJ - Hornady Custom Grade 2-Die Set Your Rating. Price. 1 star 2 stars 3 stars 4 stars 5 stars. Value. 1 star 2 stars 3 stars 4 stars 5 stars. Quality ... Jdj cartridges, From the data I have on these 3 cartridges it looks like the 7X30 JDJ (aka 7-30 Waters Improved) will do anything the other two cartridges will do in a Contender but with less powder and less recoil. If you were going to have my barrel rechambered for a 7mm Cartridge which would be your choice and why., JDJ LINEUP OF CARTRIDGES - 01/16/2018 7:25 AM. JD Jones developed I believe the most successful line of "wildcat" cartridges for the Contender which turned the handgun hunting world around setting it full speed ahead. Basically he came up with the "maximum yet safe" cartridge in about every caliber for the Contender package, …, Replacing ink cartridges in your printer can be a daunting task, but it doesn’t have to be. With this step-by-step guide, you’ll be able to quickly and easily install new ink cartr..., J.D. Jones wrote an excellent article in the 6th edition of Cartridges of the World. While he covers the7x30 Waters based JDJ unfortunately he ..., The 14.5mm JDJ was created by SSK Industries of Wintersville, Ohio. Overview. It uses the .50 BMG case with the neck opened up to accept a .585 in (14.9 mm) bullet. It fires the 1,173-grain (76.0 g) bullet at 2,700 ft/s (820 m/s) with the fire-formed load. The Barnes 750-grain (49 g) bullet can also be loaded to 3,000 ft/s (910 m/s). , As its name implies, rifles chambered for the cartridge have a bore diameter of 0.950 in (24.1 mm), which would normally classify them as Destructive Devices in the United States However, SSK sought and received a "Sporting Use Exception" to de-regulate the rifles, meaning they can be purchased like any other Title I rifle by a person over age 18 with no felonies on their criminal record., rare and hard to find 16.25 375 jdj super sixteen contender rifle barrel – t/c thompson center stainless steel – front sight present – rear sight present – lightly used beautiful hard hitting stainless steel rifle barrel. chambered in the wildcat 375 jdj cartridge. 16.25 oal stainless steel heavy bull barrel – bore is sharp and prominent., 411-JDJ With Accurate Mold 340gr Bullets. After purchasing two molds from Tom at Accurate Molds for the 411-JDJ, I have begun load development for that bullet. I cast off the 41-340J (gas check bullet) and some 41-340K (PB) bullets. Decided to start this load development using RL-7 since its position on the relative burn rate chart is favorable ..., Designed. 1990s. Manufacturer. SSK Industries. The Whisper family of firearm cartridges is a group of wildcat cartridges developed in the early 1990s by J.D. Jones at SSK Industries. The Whisper family was developed as a line of accurate, multi-purpose cartridges using relatively heavy rifle bullets for a given caliber in subsonic loads. , This rifle is designed to fire a cartridge based on the 20x110mm Vulcan Cannon cartridge, shortened, and necked up to match a .950 caliber (24.1mm) cast …, 375 JDJ was designed by J.D. Jones of SSK Industries in 1978 as a handgun hunting wildcat cartridge. By the term “wildcat”, we mean rounds that are traditionally very custom rounds with little mainstream production. The 375 JDJ may still be considered a Wildcat round due to its low production, but is one of the more popular wildcats available., The Internet's Gun Store, For as long as I can remember I have been handloading and shooting many popular wildcats, like the .357 Herrett, 7mm TCU, .243 AI, .280 AI, .300 Whisper, .375 JDJ, and several others. I learned about case forming and load development by working with these cartridges, often in the very early years when there was little available data., J.D. Jones wrote an excellent article in the 6th edition of Cartridges of the World. While he covers the7x30 Waters based JDJ unfortunately he doesn't include a sample loading. He does state that it is ballistically the same as the 7mmJDJ#2 which is based on the 307 win cartridge., The several offhand targets with the shooter having to move was my contribution, and quickly done away with. Between hunting and IHMSA I decided to make up some cartridges—the 6.5, 7mm, and .375 JDJ reamers were ordered at the same time and the barrels all came together at the same time., A leaking monobloc tap can be repaired using a screwdriver and a wrench. However, monobloc taps are unique because they use a ceramic cartridge, rather than a rubber washer or cera..., Instagram https://www.instagram.com/jones.beene - @jones.beeneJones Beene, of Knight Rifles & Lead Guitarist for Calling Glory, shooting the largest center-f..., Jan 24, 2019 · A cartridge I selected is the .309 JDJ, one of the many top-performing wildcat creations by J.D. Jones of SSK Industries, an extremely knowledgeable ballistician, inventor and hunter. , May 6, 2013. #7. Here are two more SSK cartridges I have. 6.5 Mini-Dreadnaught JDJ based on the 220 Swift case and 35-06 JDJ both have 60 degree shoulder and short neck. Pretty sure all of the JDJ cartridges for the Encore have short necks. Never had any issues with them. 257JDJ Contender based on 225 Winchester has a short neck too. Ordered list., The 950 JDJ bullet generates a Recoil Impulse of 200 lbs/ft, or about 13 times the recoil energy of a .308 Winchester - Big Kick! Skip to content. ... Probably one of the biggest cartridge in the world is the .950 JDJ. It is .95 inches in diameter, and weighs a stout 3600 grains (8 ounces, ..., List of rifle cartridges, by primer type, calibre and name. From left to right: 1.17 Hornady Mach 2, ... .30-06 JDJ.30-06 Springfield.303-06.30-30 Winchester.30-378 Weatherby Magnum.30-40 Krag.300 Precision Rifle Cartridge.300-221.300 …, The .950 JDJ large caliber rifle cartridge was developed by American gunsmith and weapon designer J. D. Jones of SSK Industries. It has a bullet diameter of 0.950 inches, while its case length is ..., To replace a Pfister cartridge, start by turning off the water supply and opening the faucet to drain out any remaining water. Remove the handle, valve adapter and cartridge. Slot ..., The cartridge propels its 3,600 gr (230 g) bullet at approximately 2,200 ft/s (670 m/s). This yields a muzzle energy of 38,685 ft·lbf (52,450 J) [1] and a momentum of 154.1 Newton-seconds, about the same as a 20×102mm Vulcan round., QUALITY CARTRIDGE BRASS 375-06 JDJ UNPRIMED 20/BAG . $55.50. Less than 5 in stock Item #: QC213871 $2.78 per piece. QUALITY CARTRIDGE BRASS 375 EPSTEIN UNPRIMED 20/BAG ., Oct 26, 2017 · Rock Island Auction company has J. D. Jones’ original SSK Industries .950 JDJ rifle on hand, gun no. 1. A showcase piece, the .950 JDJ was based on the same 20x110mm cannon round used in the M61 ... , I was going to rechamber either a Marlin 336CB in 38-55 WIN or a model 375 (336) in 375 WIN to a cartridge I designed and call the 376 Steyr Short, but have a better way to go. I have been in contact with prominent lever action gunsmith Mr. Regan Nonneman about rechambering my Marlin Model 375 from 375 WIN to 375 JDJ., JD Jones, a legend in cartridge development and barrel making, was the brain behind the .950 JDJ’s design. This massive round, fashioned from a 20 mm Vulcan Cannon round, delivers a staggering 38,000 foot-pounds of force, nearly triple that of a 50 BMG. SEE ALSO: California’s SB 1160: Annual Gun Registration or Face $1,000+ Fines, As you use your printer, the empty toner cartridges will accumulate. Instead of mindlessly tossing them in the trash, save them instead. In many cases, you can trade in empty toner..., I would suggest .309 JDJ data as a starting point, then work up in the Encore. .30 Bellm is a sawed off .444 Marlin case 1.395″ long necked to .30 caliber, designed specifically for Illinois handgun deer hunting, which is restricted to cartridges 1.4″ long or less, must be .30 cal. or larger, and produce at least 500 ft/lbs muzzle energy ..., Once you spend the money to purchase a reliable printer and have one you can depend on, it’s nice to be able to save a few dollars on the ink it takes. Several places offer an oppo..., The 950 JDJ bullet generates a Recoil Impulse of 200 lbs/ft, or about 13 times the recoil energy of a .308 Winchester - Big Kick! Skip to content. ... Probably one of the biggest cartridge in the world is the .950 JDJ. It is .95 inches in diameter, and weighs a stout 3600 grains (8 ounces, ..., As its name implies, rifles chambered for the cartridge have a bore diameter of 0.950 in (24.1 mm), which would normally classify them as Destructive Devices in the United States However, SSK sought and received a "Sporting Use Exception" to de-regulate the rifles, meaning they can be purchased like any other Title I rifle by a person over age 18 with no felonies on their criminal record.