Quote:
Originally Posted by mikerjf
Starting to make 9mm, and 45acp beyond simple LSWC. Trying to be accurate, and I noticed on the last FMJ 45's that my COAL was varying more than I liked. (Using mixed brass, some once-fired, some ancient, some inbetween...)
Had an idea... instead of one smooth stroke of the press to seat, I started doing 3-4 partial strokes. First one gets the bullet straight and in a little, 2nd one in a little more, last one I go all the way and hold it a second or so at the end.
Result: Suddenly COAL is all within a .002 spread! Actually, most are right on or .001 longer. I'm wondering if maybe I'm "normalizing" how the bullet hits the seating stem?
|
What dies are you using for your 9mm and .45 loads? If they are tight in the press , you've got the brass trimmed to same length and slightly bell-mouthed (expander die) and the seating die is properly adjusted, you should have all the rounds coming out the same OAL without all the fiddling. I have RCBS, Lee, and Hornady dies for my handguns, they all have a 'floating' seater, which allows the bullet to shift a bit and self-center when you start the press to seat the bullet.
You're not trying to crimp your autoloader rounds are you?