01-01-2017, 10:01 PM
I have an 18" 6.5 ARP barrel and bolt. It has been finicky as to what load it likes, but when you find the right combo, it shoots lights out. I have shot several 1/2 MOA groups with AR Comp and the 123 AMAX, as well as 100 gr Nosler BT's with BLC-2 and H335. With factory Hornady 123 AMAX or SST's, it shoots about 1.5". I do find that ARP barrels are slightly faster than other barrels of the same length. I chrono'd the 123 AMAX at 2530 fps with 27.7 gr AR COMP. I went as high as 28.5 gr, but accuracy fell off.