03-21-2020, 08:34 PM
I am using a Redding 6.5 grendel FL bushing die. I am using a .270 bushing for initial size down from 6.5 to 6mm without any issues. Then I run a .266 bushing to get proper neck tension for running my brass in my AR.
* I did find out quickly that if I tried to size down too much in one step, the brass would get crushed and deformed. This happened when trying to use the .266 bushing as the first step. Using the .270 as the first step has yielded zero crushed cases. Unfortunately I am obligated to follow up with the .266 bushing since the .270 was very light neck tension for my magazine fed AR and it caused flyers and very inconsistent chronograph numbers.
* I did find out quickly that if I tried to size down too much in one step, the brass would get crushed and deformed. This happened when trying to use the .266 bushing as the first step. Using the .270 as the first step has yielded zero crushed cases. Unfortunately I am obligated to follow up with the .266 bushing since the .270 was very light neck tension for my magazine fed AR and it caused flyers and very inconsistent chronograph numbers.