07-25-2019, 03:21 PM
Loadhunter,
That is an interesting problem. Thanks for sharing.
Personally I would try 2 things beyond what has been suggested (good stuff btw). You may what to chrono the load both single fed and magazine fed. If they are different you can be pretty sure the bullet is moving a lot. I learned on 300 BLK that crimp is not a decent substitute for neck tension. I never had that issue with the Grendel but you never know. The other thing I'd do is buy a box of Hornady 123gr ELD Black and go thru the comparisons again.
My guess is your bullet is not staying put after being chambered from the mag even though my Grendel brass has always had excellent neck tension. Good luck and please continue to share as you go.
That is an interesting problem. Thanks for sharing.
Personally I would try 2 things beyond what has been suggested (good stuff btw). You may what to chrono the load both single fed and magazine fed. If they are different you can be pretty sure the bullet is moving a lot. I learned on 300 BLK that crimp is not a decent substitute for neck tension. I never had that issue with the Grendel but you never know. The other thing I'd do is buy a box of Hornady 123gr ELD Black and go thru the comparisons again.
My guess is your bullet is not staying put after being chambered from the mag even though my Grendel brass has always had excellent neck tension. Good luck and please continue to share as you go.