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300 winmag minimum case neck length

Jig Stick

Gunny Sergeant
Full Member
Minuteman
Aug 27, 2010
1,438
5
45
Pittsburgh PA
I have some 2nd fired brass that I'm getting ready to reload. I'd like to trim all of my case necks so they are the same. I can't seem to find what the minimum neck length is. I don't want to trim them too short. Any help?
 
Re: 300 winmag minimum case neck length

Don't trim them at all until your bolt is hard to close. Every extra bit of neck length helps with this case.

I would not worry about uniforming length. Wait and determine your chamber's oal dimension and then trim only a minimum.