Bullet weight depends on your barrels twist rate and length of barrel. If it is a 1-10 twist shoot anywhere between a 150-180 higher twist rates you shoot lighter bullets. And choose your ammo upon how hot it is loaded IE hornaday a are typically hot loads and see what groups best. Bullet weight means a lot less if you place your shot well and your rifle is accurate on its cold shot. The cold shot usually isn't the most accurate.
