Thanks fellas, great info.
So I should be able to simply run 300 Win brass through a FL die, and then fireform?
Donut issues with this method?
Should work fine to run them into an FL die and then fire form. The form/trim dies will produce better concentricity but if you fire form it doesn’t matter.
The form and trim does are nice but RCBS 58151 might be discontinued. Maybe you could custom order them from RCBS though. I tried calling but CA is sheltered in place.
Donut issues. Probably. I haven’t been able to avoid them. That 300 Win Mag shoulder becoming the base of the neck is just there. You can ream it out, neck turn it, whatever, but I would be surprised if you didn’t see them eventually.
