Thread: Increasing case neck tension

Greetings,
I have seen this problem over and over again with the Lee Collet dies and the problem is always brass that is too hard. You need to anneal the necks after each third load max and better more frequently. The Collet dies produce very straight necks, which aid accuracy but do need brass that is not too hard. The die is not the problem it is the hard brass.
Regards Grandpamac.

If I read OP correctly he is either on 1x reloaded or 2x reloaded.

One way to test the effectiveness of collet dies is to test using the die mandrel ie remove die from press and slip case over the mandrel and gauge "sloppiness'. There will always be a degree due to springback but as GPM states after several sizings the brass will spring back more so and the fit of the mandrel into the neck will be noticeable more loose.

I never thought of that. I will try this tonight!

Interesting regarding the hard brass. This is my first time running Norma brass so that could explain why it is the first time I have come across this issue before.