body die made with chamber reamer...a problem

[lpreddick]

i had a 22-250 body die made with the same reamer as the gun. my plan was to push the shoulder back as indicated without changing the body size. the spring back of the case after firing allows it to go into the body die without touching the sides so the shoulder is the only part sized. the die does this BUT i started noting a bolt click at the end of bolt rotation. the web area of the case was .001 or so too large even though i wasn't hot loading. my gunsmith pointed out the body die doesn't support the case body and when pushing the shoulder back the case is buldging at the web producing the bolt click! a supported case allows the shoulder push back at the forward end of the case. a custom body die should be made with a smaller reamer than the chamber reamer. live and learn!

 

[DOGCAPPER]

I always wondered how that could work...Run the reamer in the die deeper? LT

 

[GSPV]

Could you explain to me how you get any resizing on a case in a die cut with e same reamer as your chamber?

Maybe I'm missing something here, but it seems to me that for a die to do any resizing, it has to be cut with a reamer smaller than the chamber reamer.

 

[CatShooter]

Could you explain to me how you get any resizing on a case in a die cut with e same reamer as your chamber?

Maybe I'm missing something here, but it seems to me that for a die to do any resizing, it has to be cut with a reamer smaller than the chamber reamer.

He wanted a die that would be able to push the shoulder back, without touching the body - so if you cut a die with the chamber reamer, but make it a few thou short, it will be able to push the shoulder back a few thou - but since the body is not supported, the body walls moved outwards like a squished tomato and now the body was a thou or so larger than it needed to be and stuck to the chamber walls, causing the bolt to stick on extraction.

 

[mayday1648]

Would using 308 small base die for web setback help???

 

[CatShooter]

Would using 308 small base die for web setback help???

It might - a 45 Auto sizing die would probably work, also.

 

[Kingfisher]

I'm guessing the body die was made with "rougher" and not the finish reamer? Otherwise the problem you're describing would occur. You need it undersized, not same-size, which is what you'd get with the finisher. Otherwise... what Catshooter said... the die would have to be cut short, and even then the force is probably going to blow out the bottoms of the cases.