Ok guys i need some input. I am not new to reloading have several years under my belt. Problem is im having trouble. With bumping the shoulder back on 300 win mag case. The gun is a ruger m77 hawkeye LRT. New brass once fired. I set my rcbs fl die up for a 0.003 bump. But when i check the case in the gun its hard to lock the bolt down and when i eject the case it has half moon on the head of the case. I have never had this problem before. Cases are all trimed to 2.610.onec the case is fired the headspace is 2.272 so i bump it back to 2.269. But it tight when bolting down the bolt.any ideas
Bumping shoulder back on 300 win mag
- Thread starter Amaturegunnut
- Start date
Take a sharpie and mark the circumference of the case just above the belt, and the shoulder. Then chamber and see where it’s interfering. Belted mag dies notoriously don’t size the area just above the belt enough.
The other thing is you may not be sizing the case just above the belt. I has pretty mush the same issue. I got a Larry Willis
Belted Magnum Collet Resizing Die. Check out his web site. I got one and have never had a issue since.
Belted Magnum Collet Resizing Die. Check out his web site. I got one and have never had a issue since.
