OK I finally got some time to shoot my 7mag with a chrono. I was pleasantly surprised with the max speed. I did make one mistake. I didn't have the chrono set up correctly when I shot my Money charge(I had only 3 rounds of this), so I got no results for that one. That charge is 62.6gr RL22. I did get 9 shots at 63gr RL22. I shot offhand at a target 75 yards away. It was sunny with wind and 30 degrees at around 600' elevation.
9 shots. Fully preped Remmington brass. 162gr ELDx. 63gr RL22. CCI250 primer. COAL 3.396 Rem 700 24" barrel. 30F. 600' elevation.
Average speed 2886
High 2905
Low 2859
Extreme spread 46
Standard deviation 14.7
I'm pretty happy with that. I did think the spread would be a little better with all of the attention to detail I take with my brass with this rifle. I wonder what the velocity would be with my "money" charge? only .4 of a grain difference. And how does this data apply at a higher elevation, say, 5000'?
9 shots. Fully preped Remmington brass. 162gr ELDx. 63gr RL22. CCI250 primer. COAL 3.396 Rem 700 24" barrel. 30F. 600' elevation.
Average speed 2886
High 2905
Low 2859
Extreme spread 46
Standard deviation 14.7
I'm pretty happy with that. I did think the spread would be a little better with all of the attention to detail I take with my brass with this rifle. I wonder what the velocity would be with my "money" charge? only .4 of a grain difference. And how does this data apply at a higher elevation, say, 5000'?