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November 7, 2015
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I like the way he explains bump. Since I load 30-06 for multiple rifles I have to bump it back to nearly new dimensions. OTOH I’ve been using new brass for the last several years for hunting ammo. I’ve always avoided belted cases, I never thought about headspacing them on the shoulder.
Mike
He has an entire loading series that is easy to understand.
As far as using the base to shoulder method of head spacing belted magnums you can only do this after you head space off the belt first.
The last 10 groups I shot were 2,671 to 2,782 fps. The 53.6 to 53.9 loads are in the 2,745 fps range. Highest this time was 2,782 fps.
Loaded another 50 rounds. 10 each of the 5 charge weights. It is a mini powder ladder test. All loads are between 53.3 and 54.1 grains .2 grains apart.
I might have messed up. I watched the weather forecast all week and it looked like it would be cold and windy. I had thought about taking a second rifle if the weather was bad but I forgot until I was pulling out of the driveway. I should have stopped and got some ammo and another rifle. Well it was a lot colder than the other days that I had tested. But no wind. 4 of the 5 groups shot slower than before. The other one was higher?
All of the groups produced good ES under 20 fps. 2 of the groups did shoot under 1″ Luckily I still have the other identical 5 groups. I will take a second rifle next week.
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