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How many grains of powder??

240 grains!!!

I held the dummy cartridge in this picture. It’s frigging HUGE!!!! Carroll from Sierra bullets came to Ohio for IHMSA Internationals and visited JD Jones and JD gave him a 950 JDJ cartridge.
Not for the faint of heart, the .950 JDJ utilizes a .95 caliber 2400 grain bullet which travels at a speed of 2100 fps using 240 grains of powder. When fired, this beast generates 25,400 foot-pounds of muzzle energy and 277 foot-pounds of recoil energy, which is equivalent to firing 10 .30-06 rifles at the same time. Each bullet costs $40 to purchase.

9FE3745A-DC5A-40A0-8D7F-809552E527C6.jpeg
 
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That is one monster cannon !

My 50 cal mag knight in-line is the only rifle I have that deceased in price.
States changing the hunting regs, allowing center fire yr around skunked me on resale.
 
The gunsmith (Dennis) at SSK refused to shoot it. I believe there were two heavy guns and one light gun built. I have an end piece from one of the barrels. Not real practical but definitely a win in any argument about whose is bigger.
 
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WOW! I bet that 2400 grain bullet @ 2100fps had little difficulty going through a paper target waaaay down there at 100 yards. I see no sense in it.
 

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