TJ Brass + Redding Die = Problem

[Foxbat]

I am getting this strange problem that only happens on TJ brass I sometimes get in the mix while loading the 38 SC. The sizing die is carbide Redding 38 Super. Should a different die be used on TJ?

Material gets pushed down, bunching near the bottom of the case, making it unusable.

[Pat Miles]

Are the 38TJ range pick ups? Given that you are only having problems with the TJ and if they are range pick ups I would offer that those were probably shot in a gun with a generous chamber and expanded accordingly. If you have any other TJ that has not been resized measure the OD in a couple of spots with a caliper then compare with measurements from brass that you know have been shot in your gun (before resizing).

I had the same problem with brass (38SC) I picked up at a major match I RO'd and shot a couple of years ago. Ended up resizing the bucketful one evening and culling out those like you have.

CYa,

Pat

[Hannu]

Non-ramped barrel ?

[Aircooled6racer]

Hello: I think that is why Pat(Whatmeworry) bought a Case-Pro to solve some of those problems You could try lubing the brass. I am not sure if that will help though. Thanks, Eric

[GrumpyOne]

I'm betting a very generous chamber....

[Foxbat]

I probably still have some un-sized, I will pull them out and look at the bulging.

[RickyH]

My 9mm Lee U die does the same thing on some brass.

[Foxbat]

I did some tests, and it seems it is indeed related to bulging - I selected about 30 such TJ cases, and the more severely bulging ones had this problem, about 4 out of 30.

However, there were other brands cases more bulging, and they did not have any issues. Probably the brass composition played its role. All these cases were Starline.