TackDriver284
Handloader
- Feb 13, 2016
- 2,560
- 2,140
Did a ladder in one grain increments for the neck turned Lapua brass
74 gr - 2874 fps
75 gr - 2931 fps
76 gr - 2970 fps
77 gr - 2996 fps
Book max is 78 gr and have not pushed hard, this is just a test to see if pressure and speed have came back down to normal compared to the tight necks on recent test.
Recent test before neck turning:
77.0 grains / 3041, 3075, 3068 fps
77.4 grains / 3052, 3018, 3061 fps
77.8 grains / 3096, 3025, stopped shooting
78.2 grains N/A
In the first picture, with Lapua , 74 gr was the center shot, 75, 76 and 77 grains stacked up on the right. It's an improvement from last test which gave me 1.25 - 1.5 inch groups. I'm impressed with results, and putting the 1X fired Lapua batch on the burner for now. I'm going to be using the Normas and have 12 virgin pieces left out of 40.
Tested the Normas virgin brass after skimming .0005" to clean up the necks, 3 shot groups:
76.4 gr - 2,923 fps ave
76.7 gr - 2,944 fps ave
77.0 gr - 2,957 fps ave
Not pushing it since 78 grains is book max.
In the 2nd picture is the 76.4 gr 3 shot group , and last picture is the 77 grain load. I'm impressed.
I'm happy with the results. Once all brass is fireformed and I'll tweak the loads. The 200 AccuBond rocks.
74 gr - 2874 fps
75 gr - 2931 fps
76 gr - 2970 fps
77 gr - 2996 fps
Book max is 78 gr and have not pushed hard, this is just a test to see if pressure and speed have came back down to normal compared to the tight necks on recent test.
Recent test before neck turning:
77.0 grains / 3041, 3075, 3068 fps
77.4 grains / 3052, 3018, 3061 fps
77.8 grains / 3096, 3025, stopped shooting
78.2 grains N/A
In the first picture, with Lapua , 74 gr was the center shot, 75, 76 and 77 grains stacked up on the right. It's an improvement from last test which gave me 1.25 - 1.5 inch groups. I'm impressed with results, and putting the 1X fired Lapua batch on the burner for now. I'm going to be using the Normas and have 12 virgin pieces left out of 40.
Tested the Normas virgin brass after skimming .0005" to clean up the necks, 3 shot groups:
76.4 gr - 2,923 fps ave
76.7 gr - 2,944 fps ave
77.0 gr - 2,957 fps ave
Not pushing it since 78 grains is book max.
In the 2nd picture is the 76.4 gr 3 shot group , and last picture is the 77 grain load. I'm impressed.
I'm happy with the results. Once all brass is fireformed and I'll tweak the loads. The 200 AccuBond rocks.