Bumping shoulders

[tom338]

I am bumping the shoulder on some once fired 7mm rem mag brass. Using a Redding series S bushing die and am getting a very mixed bag of results. Some bump back to where I want and the next not enough and once in a while some to much. And you can see the brass was annealed while new. Anneal again after one firing??

 

[OutdoorEdventure]

Are you lubing shoulder?

 

[tom338]

no, just rolling on a lube pad

 

[parshal]

Make sure lube is applied the same on each case. That can make a big difference.

While counterintuitive, you might need to size just a little bit more. When I'm setting my dies I'll size, measure, increase the bump, measure again, etc. You will get to a spot where the case shoulder grows in length after sizing. Just past that point is where it's most consistent.

I anneal every firing but it's not going to make a difference in what you're seeing unless you've got quite a bit of firings on a case.

 

[tom338]

I've never had an issue before, but never used this brass either, very good brass but I've heard its thick than others and it is. I try to be very consistent with use of lube on cases.