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Tennessee Gun Owners Forums
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AR-15
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<blockquote data-quote="WTM" data-source="post: 5012074" data-attributes="member: 6230"><p><span style="font-size: 13px">I found a video on YouTube where some guys shot I think a 16", 10.5, and a 7.5 over a chronograph. Same ammo. The 16 averaged around 3200, the 10.5 was around 2800 and the 7.5 was around 2450. Opened my eyes quite a bit on how much velocity was lost. But the premise for this rifle is honestly close quarters defense. I don't have to reach across the county. Therefore the velocity loss isn't near as critical. If I was building one for a longer range setup I'd look more at a 16 or 20 but for what I want I think the 10.5 is gonna be perfect. Should be a good training rifle for the kids as well</span></p><p></p><p>yeah about 400 fps exponentially between them. with a heavier round like military ball or penetrator the tested muzzle velocity is around 2400-2500 fps for the 10.5" pistol length which pretty much makes it a point blank weapon with that ammo. anything less than 2500 and it just pokes a neat little hole. pretty much why the army chose 14.5 for the m4 battle rifle.</p></blockquote><p></p>
[QUOTE="WTM, post: 5012074, member: 6230"] [SIZE=13px]I found a video on YouTube where some guys shot I think a 16”, 10.5, and a 7.5 over a chronograph. Same ammo. The 16 averaged around 3200, the 10.5 was around 2800 and the 7.5 was around 2450. Opened my eyes quite a bit on how much velocity was lost. But the premise for this rifle is honestly close quarters defense. I don’t have to reach across the county. Therefore the velocity loss isn’t near as critical. If I was building one for a longer range setup I’d look more at a 16 or 20 but for what I want I think the 10.5 is gonna be perfect. Should be a good training rifle for the kids as well[/SIZE] yeah about 400 fps exponentially between them. with a heavier round like military ball or penetrator the tested muzzle velocity is around 2400-2500 fps for the 10.5” pistol length which pretty much makes it a point blank weapon with that ammo. anything less than 2500 and it just pokes a neat little hole. pretty much why the army chose 14.5 for the m4 battle rifle. [/QUOTE]
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