Tight throat on once fired brass, do I need to turn necks?

[dellet]

Fired rounds for this lot of Norma and a different lot of Nosler brass all measures out at .314

If I read this right, you had no problems with Nosler brass and multiple firings.

You changed to Norma brass and have problems after the first firing.

If this is correct, maybe even if not, you might be looking at the wrong end of the case.

Take a once fired and sized problem case, without a bullet and try it in the chamber. This will differentiate between neck and case body issues.

With a change of brass, you may be at higher pressure and not getting a good sizing at the base.

A .311" neck, in a .315"+ chamber should not be hard extract even with .005" run out. Since your fired case measures .314", your chamber is at least that big if not more.

A case that is too long base to datum will be hard to close the bolt, but easy to extract.

You might look for marks at the base of the case body, they may not be from the die.

 

[243winxb]

Try a shorter OAL. Seat bullet deeper into case.

 

[Corey Harris]

I could see that, but the op stated that rounds seated with week old brass had .001 run out....so unless something happened to the seater in the mean time....plus as to not bumping the shoulder back, that could definitely be the bolt closing problem, but it doesn't explain the hard extraction....Does the OP have a way to measure from the base to the datum line to check for shoulder bump? Might be a part of the problem....or not..he stated he has only experienced this since the new brass, so I thought he had previous reloads that had functioned without issue.......rsbhunter

Hi everyone, I'm happy to say I figured it out. I borrowed a neck turning tool and different set of dies from a buddy. Turned the necks, problem still there. Used his sizing die on the same brass, problem went away. Put my sizing die back in the press, tried a few more rounds problem still there. Tried his die on the same brass, problem gone. I was getting anywhere from 4-7 thou runout with my sizing die. So something is definitely messed up with my sizing die. I'm scrapping it and just ordered a Redding bushing die. Thanks for all your help guys!

 

[Brians356]

Hi everyone, I'm happy to say I figured it out. I borrowed a neck turning tool and different set of dies from a buddy. Turned the necks, problem still there. Used his sizing die on the same brass, problem went away. Put my sizing die back in the press, tried a few more rounds problem still there. Tried his die on the same brass, problem gone. I was getting anywhere from 4-7 thou runout with my sizing die. So something is definitely messed up with my sizing die. I'm scrapping it and just ordered a Redding bushing die. Thanks for all your help guys!

You ought to let Redding know about it.
-