I just purchased this guy for my first AR build: http://www.midwayusa.com/product/83...contour-1-in-9-twist-16-chrome-moly-phosphate For a 1/9 twist, 16" barrel, what weight of bullets would you recommend for just your standard plinking? Before I order 4,000 bullets to make my supply chest bulge, I'm just wondering if there's some consensus matching up the barrel to the bullet weight. The barrel arrived from Midway without any documentation or suggested weights, so I'm left to doing research online. I was thinking about buying your standard 55 grain FMJ in a smaller quantity and make a few loads that way and see how it handles out on the range. Your thoughts?