Re: Velocity deviation question for 700yd gun
Plugged your data into a ballistic program I have here in my office....
BC = .496
Velocity = 3020
With 100 yard zero, calculator said +15moa adjustment for 700 yards.
Same data, but adjust velocity to 3055 and it's +14.5moa for 700 yards.
That .5moa equates to ~3.5" at 700 yards. I would put that right on the edge of acceptable. Personally, I would look reduce your extreme spread (ES) down to 15 or better.
I recently had a load for my 280 that shot accurately, but the ES was terrible. Changed primers and worked the load up again and the ES came down to 12. So maybe all you need to do is change your primer.
I'm not gonna shoot here. I'm gonna shoot waaaaaaaay over there!