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The Range
NFA & Class III Discussion
5.56 SBRs - terminal ballistics
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<blockquote data-quote="Glocktogo" data-source="post: 1542956" data-attributes="member: 1132"><p>Once you get shorter than 12.5", the velocity loss is going to be exponential. Anything under 10.5" is going to be a poor performer past CQB distances. With standard type ammo, a 10.5" is going to be good out to 45 yards, premium ammo, 85 yards or so. Obviously the 5.56 optimized has been covered in a previous post. This is not to say that 5.56 isn't lethal past these ranges, but it's overall effectiveness is dramatically reduced past these ranges. </p><p></p><p>I use TAP T2 in my 11.5" for HD and the Mark 318 Mod 0 SOST round for my 14.5", which is more for duty and outside the home use.</p></blockquote><p></p>
[QUOTE="Glocktogo, post: 1542956, member: 1132"] Once you get shorter than 12.5", the velocity loss is going to be exponential. Anything under 10.5" is going to be a poor performer past CQB distances. With standard type ammo, a 10.5" is going to be good out to 45 yards, premium ammo, 85 yards or so. Obviously the 5.56 optimized has been covered in a previous post. This is not to say that 5.56 isn't lethal past these ranges, but it's overall effectiveness is dramatically reduced past these ranges. I use TAP T2 in my 11.5" for HD and the Mark 318 Mod 0 SOST round for my 14.5", which is more for duty and outside the home use. [/QUOTE]
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