Author: britrifles
Subject: Inside neck reaming...
Posted: January 23 2024 at 3:59am
I think it happens to some degree with all bottleneck rifle cases after a certain number of reloads. If you are trimming brass, the necks are gradually getting thicker with each reload, and it starts thickening at the neck/shoulder junction since the brass flows forward. Pushing the shoulder back with a FL die is squeezing the shoulder down also contributing to the condition. It’s not detectable if you are using standard dies with a neck expander, or with a collet type neck sizer.
Subject: Inside neck reaming...
Posted: January 23 2024 at 3:59am
I think it happens to some degree with all bottleneck rifle cases after a certain number of reloads. If you are trimming brass, the necks are gradually getting thicker with each reload, and it starts thickening at the neck/shoulder junction since the brass flows forward. Pushing the shoulder back with a FL die is squeezing the shoulder down also contributing to the condition. It’s not detectable if you are using standard dies with a neck expander, or with a collet type neck sizer.