RL338
Handloader
- Mar 23, 2017
- 3,272
- 5,289
Late last year I picked up some cheap powder and bullets. The powder WC867 was 16lbs/$84 plus shipping and hazmat and bullets were Blem Hornady 230gr A-tip for $46/100 (I think). So with crappy weather today I dug them out to try in the 30-378. The powder bottle states loads similar to H1000 - US869 , that’s a large gap.
So I started low and went up.
97grs - 2912 fps
100grs - 2923 fps
102grs - 2938 fps
5 grain gave me a net of 26 fps , wow
Continued on
105grs -3033 fps
107grs - 3073 fps
109grs - 3150fps
Now I’m getting somewhere with my velocity. 109 there was a faint ejector mark. So I went a little more to see if I had maxed out.
110grs - 3222fps still faint mark
111grs - 3263fps stiff bolt
This was using new Hornady brass seated at 4.100”. For starters this ball powder needs some pressure to start building velocity. Not really comparing apples to apples digging back on my old load data which was a different barrel with 230gr Berger Hybrids (factory 26” 1:10 twist compared to now 28” 1:8 twist) it runs close to my Retumbo data. I loaded some at 108.5grs to try on paper sometime when weather gets nicer.
They don’t fit in the box very well
So I started low and went up.
97grs - 2912 fps
100grs - 2923 fps
102grs - 2938 fps
5 grain gave me a net of 26 fps , wow
Continued on
105grs -3033 fps
107grs - 3073 fps
109grs - 3150fps
Now I’m getting somewhere with my velocity. 109 there was a faint ejector mark. So I went a little more to see if I had maxed out.
110grs - 3222fps still faint mark
111grs - 3263fps stiff bolt
This was using new Hornady brass seated at 4.100”. For starters this ball powder needs some pressure to start building velocity. Not really comparing apples to apples digging back on my old load data which was a different barrel with 230gr Berger Hybrids (factory 26” 1:10 twist compared to now 28” 1:8 twist) it runs close to my Retumbo data. I loaded some at 108.5grs to try on paper sometime when weather gets nicer.
They don’t fit in the box very well