Do you have a chrono? If not then you are kinda pissing in the wind. You’ll want one to Find the most consistent velocities with different charges but all other variables the same...bullet, COAL, neck height and tension, primer, new brass etc.
As far as those groups, what I’m seeing is that all the vertical spread is very similar between the different charges weights. So the charge weight is not changing the bullets vertical flight path that much. It’s the wind drift that was giving you the hard time. And a rocking target.
Also I’m assuming this was at 100 yards. With a scope or red dot or irons?
Try to shoot at a longer distance and see what the vertical spread becomes then with different charges.
Last edited by matemike; 04-24-20 at 23:09.
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