I started with several different 55gr pills for my R-15 (which has a 1-9 twist), the most accurate were the V-Max's. I had reasonable groups, about 1 1/2" or so. I dropped to under an inch by moving up to 60gr'ers, again V-Max. These shoot much better at 300 yards than the 55's did, which is where nearly all of my yote shots are at. I did buy some Berger 64's to give a try with, but haven't loaded them yet.