Re: 338 Win Mag and 215 Sierra Game King
77 grains of IMR 4831 will get you 3000 fps with the 215 sierra. 76 grains will get you 2900 out of the 225 AB. This is out of my Tikka 24 3/8" barrel. These are max in my rifle and it shoots great at max. Drop those loads two grains and work up.
Predictions are difficult, especially when they involve the future