I had the same problem and I had to resort to a LOOOONNNNNG drop tube to get some of my loads into the case. Remember too that what you make up in BC with larger bullets, you give up in case capacity, thus velocity suffers.
-------------------- So I can't spell, so what?
Those who beat their swords into ploughshares, will plough for those who don't!
Those who fail to learn from history will be doomed to repeat it