Got an SR 25 ec a month ago and cannot make it shoot well for the life of me. Nearly every load I run through it will shoot very well around .75 inches at 100 yards for the first 10 or so rounds, then it all goes to hell. The next group will usually have two touching and the rest of the three going where ever they want turning the group into at least 3 inches. Loads I have put through it include fggm 175gr the 7.62x51 variety, 168 fggm .308, (too hot for the rifle left ejector marks on the brass) Winchester match 168gr, and 7.62X51 American Eagle 168gr otm loaded for the M1a. The am eagle is the only thing that is consistent. It will shoot right around 1.5 inches no matter what. I have also ran multiple hand loads through it all with lapua brass, CCI br-2 primers, 175 grain sierra's, and IMR 4895 in charges from 39.0 to 41.5 in 3 tenths increments. I have eliminated optics as the problem, and its not like I am blazing rounds through it, a 5 round group take me at least 2 minutes then I let it cool completely before starting again. I clean the rifle thoroughly after every shooting session. Next trip out it starts all over again. Any ideas or suggestions?
Thank you
Thank you