30 mi carbine problem or not

Either your sizing of it is a problem, or its lost critical tension/springback.

NEither is good..........

Although, the # pressure you are pushing it into isn't stated... " hard and very Hard" are subjective.

"Excessive" crimp is never the answer to a reloading problem. "Excessive" being outside what is published and customarily employed.


A definitive answer could be obtained by sizing a piece of new brass- and seeing if you encounter this problem.

If you do, 'taint the brass, my friend.

headstamp on the brass?

If nothing else in your setup has changed such as new dies or a new setup on the old ones you may need to anneal the brass. More crimp is seldom the answer to neck tension problems.
Hope you get some additional info.
T

I have spent qite a bit of time on the matter as well. I could not get enough bullet tension to keep the bullet from falling back into the case.

I tried two different sizing dies. One was an RCBS and the other I forget what make. With both dies, I still had the same problem. They both sized the cases to the proper spec.

What it all boiled down to the cases bing old and losing their tension strength. I was thinking of trying annealing next. It may help. We will see.

I just won't use brass that many times in any semi-auto rifle!

It's simply not saving any money if one lets go, or the bullet sets back and you blow up an irreplaceable old rifle.

Not to mention, my eyes ain't going to be that far behind it either!

New brass is a Lot cheaper then M1 Carbines, or glass eyes!

rc

Well, I assumed you were shooting it in an M1 Carbine I guess.

Set-back is not a problem in a revolver, as long as the bullets don't fall out under recoil.

rc

On 'semi-topic': Starline told me they will begin making brass for the .30 Carbine some time this year.