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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Why gun co’s making 224 cal valkyrie in short barrels ?
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<blockquote data-quote="Gcan" data-source="post: 1582125" data-attributes="member: 102867"><p>They won't give you the link Cap because its Not true. There is no possible way the powder burns in 3" and still makes a 6.5mm bullet into a 1000 yard machine. If that were true the 357 mag would be pushing bullets at 2200fps from 6" barrels. </p><p></p><p>It is possible to get a 3-6" barrel to spit out a 6.5 but good luck hitting **** at 500 yards. It would be a handgun. Period! Powder burning up before the bullet leaves the muzzle is largely where shot deviation comes from. Large % of unburnt powder leaving the muzzle is also where deviation comes from. As soon as the powder is burned thrust stops. If the powder was burned in 3" or even 6" there would be no gas to expand and push the bullet a further 6". The bullet would be dependent entirely on inertia to travel down the lands. Thats like telling you if they get a rocket going really fast for 10 miles and shut off the fuel it will continue to accelerate another 50 miles into space. As soon as 100% of the powder is burnt or the bullet leaves the muzzle the bullet begins to slow down. This is why bullets begin to decelerate at the muzzle. </p><p></p><p></p><p>The trick is to get the bullet to max velocity without creating tooo much pressure and to leave the muzzle just ahead of the last of the powder. (Theoretical 99.99% burn) This burn rate determines Barrel length. We shoot longer barrels so we can use slower powders to accelerate the bullet over a longer period of time thus reducing initial pressure in the case. As in life where you want to die just as you spend your last dollar, you want the bullet to exit the barrel just ahead of a flash of the last of the powder. This is the great balance of the 300 blackout. They can get a 220 grain hi bc bullet to 1050fps in 8.5" using pistol powder. 12" is a waste. </p><p></p><p>I suspect you can get a grendel to perform at 18". Maybe 16". You can probably get one to shoot well out to 400-500 yards from a 14" barrel. But I always thought the point was to get the max out of every cartridge. </p><p></p><p>Sorry for the rant. Maybe we should make these ppl take an IQ test before we let them buy guns CaptnC.</p></blockquote><p></p>
[QUOTE="Gcan, post: 1582125, member: 102867"] They won’t give you the link Cap because its Not true. There is no possible way the powder burns in 3” and still makes a 6.5mm bullet into a 1000 yard machine. If that were true the 357 mag would be pushing bullets at 2200fps from 6” barrels. It is possible to get a 3-6” barrel to spit out a 6.5 but good luck hitting **** at 500 yards. It would be a handgun. Period! Powder burning up before the bullet leaves the muzzle is largely where shot deviation comes from. Large % of unburnt powder leaving the muzzle is also where deviation comes from. As soon as the powder is burned thrust stops. If the powder was burned in 3” or even 6” there would be no gas to expand and push the bullet a further 6”. The bullet would be dependent entirely on inertia to travel down the lands. Thats like telling you if they get a rocket going really fast for 10 miles and shut off the fuel it will continue to accelerate another 50 miles into space. As soon as 100% of the powder is burnt or the bullet leaves the muzzle the bullet begins to slow down. This is why bullets begin to decelerate at the muzzle. The trick is to get the bullet to max velocity without creating tooo much pressure and to leave the muzzle just ahead of the last of the powder. (Theoretical 99.99% burn) This burn rate determines Barrel length. We shoot longer barrels so we can use slower powders to accelerate the bullet over a longer period of time thus reducing initial pressure in the case. As in life where you want to die just as you spend your last dollar, you want the bullet to exit the barrel just ahead of a flash of the last of the powder. This is the great balance of the 300 blackout. They can get a 220 grain hi bc bullet to 1050fps in 8.5” using pistol powder. 12” is a waste. I suspect you can get a grendel to perform at 18”. Maybe 16”. You can probably get one to shoot well out to 400-500 yards from a 14” barrel. But I always thought the point was to get the max out of every cartridge. Sorry for the rant. Maybe we should make these ppl take an IQ test before we let them buy guns CaptnC. [/QUOTE]
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Why gun co’s making 224 cal valkyrie in short barrels ?
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