I'd like to find out what scope power shooters are using for sub-moa target shooting with their AR15s. I just finished building what should be an accurate AR15 with a good barrel, good bolt carrier, and a good trigger with a free float h/g. I just test fired my rifle at 100 yards with my 1- 4x scope taken off my other AR15, and while my patterns were o.k., they were not as good as I would like. Part of the problem is no doubt me, although I did shoot competitively on a small bore rifle team quite some time ago, so I know how to breathe and squeeze, but now my 61 year old eyes are a lot older. And yes, I know I need more practice! I was bench resting the rifle on a plastic rest with a sand bag with me on the unsupported stock. The ammo wasn't match grade ammo because I couldn't find any at the last minute before heading to the range. I didn't feel I was able to zero in on the target using the 4x power setting on my scope, but maybe it's my eyes. I'd like to know what power (I know , there will be a range of powers used) that would be good at 100 and 300 yards for my rifle. I'm thinking of something in the 4-16x range unless a lot of shooters think a higher power would be better. I understand the problems associated with using a scope with too much magnification, so I don't want to over do it. Thanks, and sorry this is so lengthy.