The best way to find out the "best" ammo for "YOUR" rifle is to buy a box of several brands and start shooting. Keep records. Shoot each test under the same conditions such as cold or hot barrel, temperature, wind speed, bench or off hand, etc. You just never know what brand of ammo a rifle will like most, or what bullet weight works best. And it depends on what you want to shoot, too - paper or varmints.