I'm looking to do a semi-build on an AR. The Palmetto State Armory complete uppers seem to be getting a lot of good reports and are very reasonably priced. But it seems everything they are making is in a 1:7 twist. This seems pretty aggressive for a general purpose carbine. Would you be concerned about 55 grain bullets with a 1:7 twist? Or should I really be looking for a 1:8 or 1:9? My intent is a rifle that will be used for plinking, HD, and coyotes. I'll probably look at a different upper for varmints down the road.