I've powder coated quite a few rifle bullets (mostly 300 blackout) and everything has always gone smoothly.
Did my first batch of 9mm bullets and the seating die seems to be crushing the powder coating as it's seated.
The dies are a standard Hornady sizing die and then I run a Lyman M die. The bullets seems to seat relatively easy but the bullets kinda "stick" on the down stroke and when the bullet comes out it has a ring around it where the seating seating stem made contact.
Anyone have this problem before and solve it? Do I need to run a harder alloy? Cure the bullets better? The powder is Smokes powder baked at 20min at 400F.
Any help is much appreciated!
Before
After