RL338
Handloader
- Mar 23, 2017
- 3,161
- 5,083
The other week I did a primer test to see if there really is a difference. I used the 375 Wby and 270gr Speers that I backed off the load a little so there wouldn’t be any pressure surprises.
Results are as followed.
The CCI had a spread of 60fps which is somewhat odd. These were fresh from SW this summer. I wonder if running around the clock has brought them a quality issue. These are what I was using in my 338WM , maybe that was causing an accuracy issue for me. I firelapped that barrel and did switch primers and the accuracy did improve.
I’m going to run this test again in the 338WM instead to see if there is a difference.
Results are as followed.
The CCI had a spread of 60fps which is somewhat odd. These were fresh from SW this summer. I wonder if running around the clock has brought them a quality issue. These are what I was using in my 338WM , maybe that was causing an accuracy issue for me. I firelapped that barrel and did switch primers and the accuracy did improve.
I’m going to run this test again in the 338WM instead to see if there is a difference.