Just picked up a 7 saum proof prefit for an impact. I ordered ADG brass and plan to try several bullets from 162-180 in it. I was going to order a SAC or Redding S bushing sizing die and I was wondering what size bushing everyone is using before I order my die or get a round loaded to cheating dimensions. I was guessing .313 or .314 but that is strictly a guess
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What bushing size for 7 saum?
- Thread starter tlsmith22
- Start date
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Rick Richard
Well-Known Member
I am using .313 with ADG brass and HH 143
Loaded diameter is .3165 on ten i just measured with various bullets
Sounds like I should buy a .313 and a .314, maybe even a .312 to be safe
Rick Richard
Well-Known Member
If you want to, but I doubt you will notice any significant difference.
Are you using SAC dies or Redding?
Rick Richard
Well-Known Member
Redding
Redding seems like the way to go unless you have multiple saum calibers. I have had good luck with them and the SAC dies
Thank y'all
Im using a SAC .314 on ADG brass for a Proof prefit with great results, loaded round is .316 with 162 ELDX
Jakeweb09
Well-Known Member
I use the sac die with .313 and a decapping expanding mandrel, hard to beat.
TontoDean
Active Member
I am just starting to anneal and to using mandrels. Have been using a Redding die with a .315 bushing, which seemed to work fine. But with the .282 Mandrel there is zero resistance. Loaded neck size is .317.
Please advise to what would work the best.
Thanks.
Please advise to what would work the best.
Thanks.
Rick Richard
Well-Known Member
Not sure all will agree, but either use an expanding mandrel OR bushing not both…unless the neck has been deformed (oval).
JakeC
Well-Known Member
Yeah you're on the right track. 314 is my main, .312 is my backup for do overs on dents or ones I didn't turn correctly. When I got my brass from gunwerks the necks were massively thick, I don't know if that's a thing with regular adg stuff but I couldn't chamber a loaded case. I forget how bad it was, like .015-6 thick.
Anyway you got it. I actually went with a hornady bushing die at the time because it's all there was out there and it's been fantastic, absolutely beautiful. And I got the forster micrometer seater, have been very happy with that.
