I just casted for the first time the other day. I have 3 molds that I tried. 9mm 124gr, 40s&w 175gr and 45acp 230gr. All Tumble lube bullet molds.
Lee says the tumbler lube bullets don't need to be resized.
every mold casted a couple thousands over what they should have.
So before I ordered a sizing die, I decided to try something.
My 45 acp bullets I casted measured .454. So I setup my lee dies in my press and sized my brass then flared it and seated one of the .454 bullets (no primer just dummy round) and then used the factory crimp die (like I normally do on all my auto bullets).
I then pulled the bullet and measure it. Guess what?
It measured .452! right where it should be.
Am I missing something here or do some people just go over board and size anyway because that is what they are use too?