With your RCBS dies in .45acp, properly adjusted, you will not have any setback problems at all.
Pushing the bullet nose against the edge of your bench is a good idea. I'm not sure how that could be formalized. I can lean on mine as hard as I want, no movement at all.
If you want to shoot...shoot...don't talk! Tuco
USAF Munitions 1969-1992