Re: SHORT BARREL .308 BOLT GUNS?
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Supa_Fly</div><div class="ubbcode-body">why not get the best of both?
fast twist, tight bore, short barrel... compare a shorty with those requirements to a 24-26" tube... then come back & we'll talk
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Which increases presure. No free lunch. no magic. The same load in a longer "match" barrel is likely to be faster or at lower pressures.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: gugubica</div><div class="ubbcode-body">I dont give up anything from a performance standpoint with my 20". So, why not? </div></div>
In many guns, with many loads the slower speeds are enough to make the gun far less accurate. You may still hit "stuff" but the difference is often enough to not know if the miss was you or the lack of accuracy. Guys trying to get MOA or under are different from trying for double this.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: ranger1183</div><div class="ubbcode-body">Enlighten yourself.
http://www.tacticaloperations.com/SWATbarrel/
Read and believe.
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I'm very "Enlighten" and would not consider using a short barrel past 700-800 but I aim for MOA or smaller, shoot under all local conditions, load to reasonable pressures, know that many barrels won't do this, can change projectiles, powder, know I might need to reach a top node for best accuracy and a short barrel is often not able to do this (see above). I want my guns to be supersonic with every load, at all ranges and conditions I shoot in.
"Match" barrels are more likely to do this and that's another important factor.
A 155 Scenar @ 2770 (about "normal") is doing 1159fps at 1k. That is at or BELOW the speed sound. You are in the zone where one projectile is above, one below. Instant accuracy loss. There is no doubt projectiles in this range of speeds WILL be less accurate. I like accuracy. I want my equipment to be more accurate than me so I know misses are my fault
Rather than everyone jumping on something popular we should understand what's going on, where we might end up and what we give up. If it fits our use then there is no problem. If you are aiming for 18 inch targets at 800-1k then being borderline subsonic is probably not a problem. Once you are trying for MOA, 1/2MOA it is an issue and I have yet to see anyone factually argue there is no accuracy loss.