Re: OLYMPIC ARMS .223 AR-15 accuracy problem
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: SIGTWO</div><div class="ubbcode-body">Anyone know of problems with the chambers on .223 ar-15 from Olympic arms. The one i have constantly shoots high out to 100 meters. Tried adjusting sites.Tried several brands of ammo. Barrel is 1/9 twist Stainless. Shoots to point of aim at 25 meters but after that it rises about 15 inches from point of aim. The gun has been shot from a secured rest produces same problem. Any ideas on the fix. </div></div>
It should shoot high at 100, about 3 to 5 inches high; and, at 150 to 170 meters, the bullet path will be about 7 to 10 inches high. At 300 meters the line of sight and bullet path will intersect again. This assumes shooting M855 from a carbine or rifle with an initial 25 meter zero. This is known as a 300 meter BSZ zero, which is proper with a BDC sight, when BDC function is desired. If you've got some sort of BUIS without a BDC function, then you can put any zero you think is most applicable to the range of target distances and types you will most likely encounter. For example, if targets are all inside 200 meters then perhaps you'd be best served with a 200 meter BSZ.
Be sure your sight alignment perspective is consistent, as inconsistent sight alignment, as well as divergent holds will produce results pretty far off from where you believe your're aiming. Just .001 of an inch off in sight alignment is worth about an inch at 300 yards. A piece of copy paper is almost .004 inches thick so, just a little sight alignment error can get you way off the target.