Re: long range 223
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Graham</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: coldboremiracle</div><div class="ubbcode-body">Whats your barrel length Graham?</div></div><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Graham</div><div class="ubbcode-body">I like 24.0 H4895 with the 80JLK for 2840fps out of my 22" bbl. </div></div>And the 90's suck. They suck so bad in a .223 case that you need a 6.5 twist, and, predictably, then they really suck. </div></div>
I was lucky enough to get some data from Jerry Tierney a while back on the use of the 90gr Berger VLD in the .223. You need to drive it over 2800fps MV to get it to stablise and to be honest, his and my (and others here) experience is that it will stablise in a 7.7" barrel, just so long as 2800+ is achieved. Oddly enough, the 7 and 6.5 twist produce some pretty marginal results. Mr Tierney's results were best in the 7.7" range. We're generally getting an average of between 0.35 and 0.45moa from the 90 Berger VLD in 5rd groups.
Down here, we shoot .223s in square range F/TR comp and our range is at sea level. We find that with the good 80gr projectiles, everything is ok out to 900yds (900yd marginal in colder weather) but at 1000, it's a crapshoot - margin of error grows exponentially - and this from guns with 30" barrels, properly set up to shoot the 223 over long distance and shooters who generally know their business.
YMMV