I primarily shoot Berger and Hornady bullets personally. The rifles will shoot just about any bullet with a little work, but my test ammo either has Berger or Hornady bullets. If there is factory ammo available, I will test it through them as well. Have been really impressed with the Hornady Precision Hunter lineup. Everything from 6 Creed to 300WM has been under 1/2 moa and very good consistency. One of my latest LE contract builds the dept wanted to run 147 ELD match Hornady match ammo. In testing, the ammo shot in the .1's consistently for 5 shot groups.