[Steve H]

I "inherited" 1200 pcs. of .45 ACP new (unfired) primed brass. It's still in the Remington boxes. Is there a need to remove the decaping pin in my sizing die and size this? It's never been taken out of the factory boxes.

[dc.fireman]

in short, Yes.

Remove the pin, if you intend to resize them (best practice).

If you don't intend to resize them (which I have done in the past), don't take the pin out.

I used Remington Pre-primed brass for sometime, and only had a few issues in 400 rounds where I needed to resize the case - because it was slightly out of round.

From experience though, I can tell you that you may need to expand/ bell the case mouths on them - some of them are a little tight when it comes time to seat them, and of course, by then, you've already added your powder to the case...

-tc

[Hondo 60]

Ya, just for ease of use I'd take the pin out & resize. Like dc said, I've had some new brass out of round too.