[dodgestdshift]

After sizing take the bullet you are going to use and try to balance it on the case mouth. If it balances, there is something wrong with your sizing step. Actually sizing is what stops the bullet from moving into the case not the crimp.

When you bell the case, you should be barely able to see the belling, but the bullet should now balance on the case mouth. Seat the bullet. Set the crimp to just remove the belling, and the bullet should be held solidly.