I was doing some snooping on the net and came across this little gem: the .950 JDJ. Seems fairly nice. Might be good for long range gophers. If they made an expanding bullet, it might actually be useable for bear defense.
The .950 JDJ is a large caliber rifle cartridge developed by J. D. Jones of SSK Industries. Jones is also the noted developer of many other well-known cartridges, such as the Whisper family.
Contents [hide]
1 Cartridge
2 Rifles
3 Ballistics
4 See also
5 Notes
6 External links
[edit]Cartridge
The .950 JDJ is among the world's most powerful, and largest caliber rifle cartridges.[citation needed] Loaded .950 JDJ cartridges are approximately the length of an empty .50 BMG casing (i.e., 4"), and are based on a 20 x 102 mm Vulcan case shortened and necked up to accept the .950" bullet.[1] Projectiles are custom-made and most commonly weigh 3,600 grains (230 g) which is 8.2 ounces or over half a pound.[2]
[edit]Rifles
As its name implies, rifles chambered for the cartridge have a bore diameter of 0.950", which would normally classify them as Destructive Devices under the 1968 (1934) National Firearms Act. 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 felonious criminal record.[citation needed] The rifles themselves, of which only a handful have been made, use McMillan stocks and extraordinarily thick Krieger barrels bearing an 18 lb (8.2 kg) muzzle brake. Overall, depending on options, the rifles weigh from 80 to 110 pounds (36 to 50 kg) and are therefore only useful for shooting from a bench rest or heavy bipod.[3] Despite the weight, recoil is significant, and shooters must be sure to choose components (i.e., scopes and bipods) that can handle the abuse. The sheer size and weight of these weapons makes them impractical for hunting use, as they cannot be carried afield. Thus, they are largely "range queens"—rifles that are brought to the range for a fun time, but not usually used for hunting or other "more practical" uses. Additionally, the cost of owning and operating such a firearm is beyond most shooters; the rifles cost ~US$8,000, loaded cartridges are $40 each, and the individual lathe-turned bronze bullets are $10 apiece.[4]
[edit]Ballistics
This article's tone or style may not reflect the formal tone used on Wikipedia. Specific concerns may be found on the talk page. See Wikipedia's guide to writing better articles for suggestions. (September 2010)
The cartridge drives its aforementioned 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] For comparison, the 5.56x45 cartridge, used in the M16 rifle, produces approximately 1,200–1,300 ft·lbf (1,600–1,800 J) ft·lbf, while the .308 Winchester, a favorite for hunters and medium-range police/military sniping, produces between 2,000–3,000 ft·lbf (2,700–4,100 J) depending on the load used. In a 110 lb (50 kg) rifle, this will develop well over 200 ft·lbf (270 J) of free recoil energy if an efficient muzzle brake is not used. The ballistics is similar to the 20mm autocannon round at 53,600 joules (or 39,500 ft·lbf). This is far beyond the shoulder-firing capacity of nearly all humans, even without considering the difficulty of shouldering such a heavy rifle. Shooting is usually heavy "lead sled" or similar shooting rest, and the rifle is not held to the shoulder because of the severe recoil and possible injury. The rifle scope has significant eye relief to avoid injuring the ocular orbit.
Kinetics and momentum of the respected .950 JDJ round with assumed and realistic real world velocities
If this .950 calibre rifle round was travelling at 670 m/s, it would have the kinetic energy of 51623.5 Joules (Ke=½mv²) (51623.5=0.115*448900) assuming a mass of 230 grams. This is a tremendous amount of Kinetic energy comparable of that of the average car travelling at 20 MPH, assuming a mass of 1,400kg. A car in this case would have 55956.53 Joules of kinetic energy. (Ke=½mv²)(55956.53≈½1400*79.93790464) In comparison to every day Kinetic energies, an average car with a mass of 1,400Kg, in addition to 80Kg total worth of passengers and luggage on board, travelling at 30MPH (the legal speed limit in built up areas) an average vehicle such as the above mentioned would have 133,096.61 Joules (2.DP) of Kinetic energy which really goes to show how powerful this round is. This round would have a momentum of 154.1 kg.m/s or 154.1 Newton-seconds. If this round was carrying its theoretical Kinetic energy, it would be able to pass through several body armored humans. It is comparable to the original tank rounds of world war one in terms of power and kinetic energy.
You can look it up on h ttp://en.wikipedia.org/wiki/.950_JDJ
The .950 JDJ is a large caliber rifle cartridge developed by J. D. Jones of SSK Industries. Jones is also the noted developer of many other well-known cartridges, such as the Whisper family.
Contents [hide]
1 Cartridge
2 Rifles
3 Ballistics
4 See also
5 Notes
6 External links
[edit]Cartridge
The .950 JDJ is among the world's most powerful, and largest caliber rifle cartridges.[citation needed] Loaded .950 JDJ cartridges are approximately the length of an empty .50 BMG casing (i.e., 4"), and are based on a 20 x 102 mm Vulcan case shortened and necked up to accept the .950" bullet.[1] Projectiles are custom-made and most commonly weigh 3,600 grains (230 g) which is 8.2 ounces or over half a pound.[2]
[edit]Rifles
As its name implies, rifles chambered for the cartridge have a bore diameter of 0.950", which would normally classify them as Destructive Devices under the 1968 (1934) National Firearms Act. 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 felonious criminal record.[citation needed] The rifles themselves, of which only a handful have been made, use McMillan stocks and extraordinarily thick Krieger barrels bearing an 18 lb (8.2 kg) muzzle brake. Overall, depending on options, the rifles weigh from 80 to 110 pounds (36 to 50 kg) and are therefore only useful for shooting from a bench rest or heavy bipod.[3] Despite the weight, recoil is significant, and shooters must be sure to choose components (i.e., scopes and bipods) that can handle the abuse. The sheer size and weight of these weapons makes them impractical for hunting use, as they cannot be carried afield. Thus, they are largely "range queens"—rifles that are brought to the range for a fun time, but not usually used for hunting or other "more practical" uses. Additionally, the cost of owning and operating such a firearm is beyond most shooters; the rifles cost ~US$8,000, loaded cartridges are $40 each, and the individual lathe-turned bronze bullets are $10 apiece.[4]
[edit]Ballistics
This article's tone or style may not reflect the formal tone used on Wikipedia. Specific concerns may be found on the talk page. See Wikipedia's guide to writing better articles for suggestions. (September 2010)
The cartridge drives its aforementioned 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] For comparison, the 5.56x45 cartridge, used in the M16 rifle, produces approximately 1,200–1,300 ft·lbf (1,600–1,800 J) ft·lbf, while the .308 Winchester, a favorite for hunters and medium-range police/military sniping, produces between 2,000–3,000 ft·lbf (2,700–4,100 J) depending on the load used. In a 110 lb (50 kg) rifle, this will develop well over 200 ft·lbf (270 J) of free recoil energy if an efficient muzzle brake is not used. The ballistics is similar to the 20mm autocannon round at 53,600 joules (or 39,500 ft·lbf). This is far beyond the shoulder-firing capacity of nearly all humans, even without considering the difficulty of shouldering such a heavy rifle. Shooting is usually heavy "lead sled" or similar shooting rest, and the rifle is not held to the shoulder because of the severe recoil and possible injury. The rifle scope has significant eye relief to avoid injuring the ocular orbit.
Kinetics and momentum of the respected .950 JDJ round with assumed and realistic real world velocities
If this .950 calibre rifle round was travelling at 670 m/s, it would have the kinetic energy of 51623.5 Joules (Ke=½mv²) (51623.5=0.115*448900) assuming a mass of 230 grams. This is a tremendous amount of Kinetic energy comparable of that of the average car travelling at 20 MPH, assuming a mass of 1,400kg. A car in this case would have 55956.53 Joules of kinetic energy. (Ke=½mv²)(55956.53≈½1400*79.93790464) In comparison to every day Kinetic energies, an average car with a mass of 1,400Kg, in addition to 80Kg total worth of passengers and luggage on board, travelling at 30MPH (the legal speed limit in built up areas) an average vehicle such as the above mentioned would have 133,096.61 Joules (2.DP) of Kinetic energy which really goes to show how powerful this round is. This round would have a momentum of 154.1 kg.m/s or 154.1 Newton-seconds. If this round was carrying its theoretical Kinetic energy, it would be able to pass through several body armored humans. It is comparable to the original tank rounds of world war one in terms of power and kinetic energy.
You can look it up on h ttp://en.wikipedia.org/wiki/.950_JDJ
