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The Range
NFA & Class III Discussion
10.5” 5.56 SBR Ammo Recommendations
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<blockquote data-quote="TulsaMike" data-source="post: 3682079" data-attributes="member: 49625"><p>Iim going to try and be a nice guy since I'm new here, but you're WAY off on ALL of your claims. Go buy a chronograph like I did and measure what your rifle ACTUALLY does, and you might be surprised how wrong the internet is. I admit I made a mistake in I meant to say the advertised velocity to a 10.5 is a 400 fps loss, not 16 to 10.5. A 75 grain bullet is also going to lose more speed going from 16 to 10.5 than a 55 gr will. The only difference comes when you have a powder designed around a short barrel, such as the TAP ammo specifically does. Most 5.56 ammo types are designed for 20 inch or longer, so the powder burn loss from 16-20 is decent, but not critical, where as going from 16 to 10.5 makes a significant difference not only in velocity, but energy. a 10.5 inch barrel is not achieving 3050+ fps with a 55 gr bullet. Not ever.</p></blockquote><p></p>
[QUOTE="TulsaMike, post: 3682079, member: 49625"] Iim going to try and be a nice guy since I'm new here, but you're WAY off on ALL of your claims. Go buy a chronograph like I did and measure what your rifle ACTUALLY does, and you might be surprised how wrong the internet is. I admit I made a mistake in I meant to say the advertised velocity to a 10.5 is a 400 fps loss, not 16 to 10.5. A 75 grain bullet is also going to lose more speed going from 16 to 10.5 than a 55 gr will. The only difference comes when you have a powder designed around a short barrel, such as the TAP ammo specifically does. Most 5.56 ammo types are designed for 20 inch or longer, so the powder burn loss from 16-20 is decent, but not critical, where as going from 16 to 10.5 makes a significant difference not only in velocity, but energy. a 10.5 inch barrel is not achieving 3050+ fps with a 55 gr bullet. Not ever. [/QUOTE]
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10.5” 5.56 SBR Ammo Recommendations
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