I only handload for my .44 magnum in handguns. My experience is with rifles. However, I make sure the cases are trimmed to uniform length and true. Then I seat the bullet a little at a time rotating it about 1/3 turn each time. By the last stroke of the press I have made one full rotation with the bullet. I only use single stage presses. Then I roll the bullets on a hard surface and eyeball them for runout. It's a poor man's method, but you may be surprised how accurate the eye can be in spotting wobble of the bullet tip.