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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Short barrel cartridge help!
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<blockquote data-quote="Paladin300" data-source="post: 2354566" data-attributes="member: 115299"><p>You loose approximately 25 fps for every inch of barrel you cut off. That is standardized across all cartridges. Some will loose more, some less but that is a good rule of thumb. Every rifle is different. I have a 18" 7mm-08 that unsurpressed will shoot 150s at 2650 with a break. If we try to push them any fast we run into issues with the unburnt powder. With a 6" suppressor on we are getting just over 2700. The suppressor allows us to turn it up a little more without accuracy issues. After we do that with a few more grains off powder we are right around 2750, which is essentially what you would get out of a 22-24" rifle in the same caliber. I should have qualified my statement more. I run 42.5 grains unsuppressed which is the max I can get and maintain accuracy and the suppressor allows me to run 45.2 grains, which is the same load I can run in a 24" barrel but not in an 18". Neither loads show any signs of pressure but the heavier load won't shoot without the can.</p><p>You are correct however that the difference in the can or without it is only about 25-50fps with identical loads.</p></blockquote><p></p>
[QUOTE="Paladin300, post: 2354566, member: 115299"] You loose approximately 25 fps for every inch of barrel you cut off. That is standardized across all cartridges. Some will loose more, some less but that is a good rule of thumb. Every rifle is different. I have a 18” 7mm-08 that unsurpressed will shoot 150s at 2650 with a break. If we try to push them any fast we run into issues with the unburnt powder. With a 6” suppressor on we are getting just over 2700. The suppressor allows us to turn it up a little more without accuracy issues. After we do that with a few more grains off powder we are right around 2750, which is essentially what you would get out of a 22-24” rifle in the same caliber. I should have qualified my statement more. I run 42.5 grains unsuppressed which is the max I can get and maintain accuracy and the suppressor allows me to run 45.2 grains, which is the same load I can run in a 24” barrel but not in an 18”. Neither loads show any signs of pressure but the heavier load won’t shoot without the can. You are correct however that the difference in the can or without it is only about 25-50fps with identical loads. [/QUOTE]
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Short barrel cartridge help!
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