Forming 7x57 from 8x57 cases

[BigDaddie]

Does anyone see a problem with doing this?

I was thinking about running 8x57 cases thru my 7x57 die then trimming to length. I was hoping to avoid NT if possible. The issue is that there is a shortage of 7x57 brass here in Australia unless u want the premium stuff. I have plenty of 8x57 lying about which I thought might be usable.

Comments and thoughts appreciated.

 

[treeman]

greetings big daddy, I don't see why that would't work you may not even have to turn the necks. I make 257 roberts from 7x57 and the necks fit just fine. regards, treeman

 

[BigDaddie]

Thanks mate. I htought it wouldnt be a big deal. I have some factory 7x57 that I might use as a comparator for neck thickness after forming

 

[Winchester69]

I have some factory 7x57 that I might use as a comparator for neck thickness after forming

Measure the neck OD of a fired case; that will give you an idea of chamber size. If the re-sized brass with bullet seated has 0.003" or more clearance, you're good to go.

NOTE EDIT: You will need the clearance with the reloaded round, not the re-sized brass.

 

[BigDaddie]

Will do. :thumb:

 

[Winchester69]

You will need the clearance with the reloaded round, not the re-sized brass.

Sorry for the mis-statement. Hope I haven't inconvenienced you.
.

 

[BigDaddie]

No confusion....I understood what you meant