Not a whole lot out there with AR Comp or 2000MR, but here is one guy's thoughts:
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: johnnyDL</div><div class="ubbcode-body">41.5 grains of ar-comp does stupid things in my shortened to 18" barrel armalite sass.i have actually shot groups as tight if not tighter than my bolt guns.i can't come close the velocities they claim,but accuracy is stupid.
win. case
41.5 ar-comp.
2.830 OAL
cci br primers
2460fps
i have a couple of 5 shot groups the.3's(crazy for a gasser)with a factory barrel,sevarel .4's and will boringly shoot .5's with out much effort.if this produce a tad more velocity it would be king.i have had good luck with 2000mr also.velocity is closer to 2600 but groups open up to a steading .75 with an occasional .5.i'm torn.</div></div>
Thanks.
I have been shooting both Varget reloads and Southwest ammo in this and the Southwest ammo burns so much cleaner it is clear they are using a different powder.
