czech you might find that your best accuracy comes with more or less top end loads.This is not always true,but not uncommon with big jugged magnum cases either.
If you don't want real fast velocities,I'd lean a bit more to the heavier bullets.Of the powders mentioned, I'd be inclined more toward the RL22 vs the quicker one's.Other good ones will be 7828,RL25, H1000, etc.
Suggestions of using 7mm Weatherby data are spot on IMHO,but watch some of them....I have seen and tried some in the 7mmMashburn (similar to what you have,and a larger case than the Weatherby)that are actually over the top in the larger case.
I have quite a few times run 300 Win Mag cases into a 7mm Rem Mag neck sizing die,and it works....I assume that's what you have there.
If you have any Gun Digests from that era, you will see some references to the Appollo cartridges.
Last edited by BobinNH; 03/09/12.
