GSSP, if your velocities are above loading manual velocities, your pressures are above loading manual pressures. It's that simple. And if you are running as far above maximum as you claim, you are probably WAY above max pressures.
What I don't understand is why, if you want 300 magnum velocities, yuo just don't buy a 300 magnum?
From your posting of your ultra high velocities and your 800 yard group size, I tend to think the idea behind your post was to impress us with your numbers, rather than to solicit ideas about what would make the most practical bear round.
