300 Win Mag reloading question

[Clem Bronkoski]

Ok guys I just acquired a 300 Win Mag in a Bergara B-14 HMR. Now I know initially I will have to full length size all my brass but what about after I fire it in my rifle?
Should I partially size my brass (back out the FL sizing die a bit), neck size only or FL resize for longer case life.
Inquiring minds want to know.

 

[Ckleeves]

Shoot your virgin brass, neck size for your second firing and then measure with a comparator after that second firing once the brass is fully fire formed to the chamber and FL size with .002 of bump from then on just like a non-belted cartridge.

I don't bother shooting all 50 or 100 pieces with that process, just take one or two pieces, fire them twice to make sure they are fully formed and then measure, set my FL die for the bump I want (or use a comp shell holder to make things real easy) and use that for the life of the brass.

 

[Ol' Red]

What @Ckleeves said pretty much covers it.

 

[asd9055]

I think by tomorrow you will have many different opinions/advices. Back when I was starting out, I had ONE rifle, One Cartridge. Folloing the advice of my mentor at the time, after the first firing, I only neck sized untill and only IF the rounds would not chamber. Then I would full size. It owrked good enough for my needs then. Now I full size everytime.