I am starting a AR build in a couple months. Working on trying to get all the details together now. I understand the concept behing the 1x7 twist over the 1x9 but does that change accuracy at all for smaller grain rounds? I guess if i went with a 1x7 would that limit me to higher grain bullets only? I will be handloading rounds for varmit hunting and some for the range, but I would also like the ability to shoot 55gr. What are some of the limitations in bullet weight that are able to be used in a AR platform? It will not be a match rifle by no means so I dont need to shoot the 80 and 90gr bullets. But I am no expert by any means at handloading so I am just looking for some advice before I start this thing up! Thanks!