Finished up my 12.5 ar10 in 308 and was honestly surprised. Gas needs adjusting but in terms of velocity from my 20 inch to my 12.5 shooting the same ammo I didn't lose much at all. Roughly 150 fps difference between the two and was still able to ring the steel plates at 300 yards with the 12.5. The guys at the range went from thats the dumbest thing ive ever seen to i want one after they saw it shoot🤣
Long story short I have 3 custom built ar10s. Theyre not new, ive had them 3 or 4 years and put probably close to a 1000 rounds through them and they always ran fine. I have recently within the last year and half gotten some suppressors. Last range trip I took my ar10s chambered in 308 and shot them with the cans and it didnt go as planned. I am shooting hand loads which are 168 grain amax over 43.5 gr of varget and for the past 4 years that load has shot lights out with all 3 rifles. But now with the suppressor I was blowing primers and the rifles were jamming. I know the suppressor can add back pressure which im assuming is my issue. Will a heavier buffer and stiffer buffer spring help? I have adjustable gas blocks on all of them but havent messed with it much yet.