My bragging shot was a 1 shot (heart shot) at 450 yds using a .308 Remington M788 fitted with a Bushnell Banner 4x scope with a BDC. I was using Remington 150 grain Core Lokt. I spotted a 6 pointer mulie buck at about 500 yds. I moved another 50 yds closer to the mulie before I ran out of cover. I adopted the prone position, snugged up my sling, dialed in 450 and gently squeezed. One shot, 1 mulie! It went straight down. When I hunted, I put a minimum of 200 rds through the rifle before I went out and purchased my tag. As for the weight difference between the AR all kitted out and a scoped M1A, each with 100 rds might be 6 lbs, depending on the garbage that you have stuck on the AR. If you can't handle an extra 6 lbs, your a WHIMP! According to you it's not feasible to put a suppressor on an M1A, thank gawd, most soldiers aren't as much of a WHIMP as you are.