Re: Berger load data for .300 Weatherby
80.5 grains of H-4831 with a cci 250 primer will give you near 3200 fps safely with deadly accuracy in every 26" barrel Mk5 I ever used. Be sure the barrel is free floated. I-7828 will go over 3200 fps max accurately and safely. Start at 83 grains and work up. For legal reasons those loads are for rifles without the wby freebore. I have worked with the 300 wby for 40 years.
Predictions are difficult, especially when they involve the future