10-23-2016, 12:56 AM
As I recall a lot of the afvice is to get your most accurate powder charge, then tweak the COAL.
My own experience has been that I get larger group size swings by changing the COAL. So, for me, it seems sensible to take care the big one first, then tweak the charge weight.
The problem with either approach is that we are dealing with both barrel vibrations and jump. The jump affects both the alignment of the bullet entering the throat and the timing. The powder weight largely effects the time to bullet exit.
If one were serious about the best accuracy (I cannot claim to be since I am thrilled when the groups drop below 0.5 moa) then running through both to verify the sweet spot in both dimensions might be advisable.
My own experience has been that I get larger group size swings by changing the COAL. So, for me, it seems sensible to take care the big one first, then tweak the charge weight.
The problem with either approach is that we are dealing with both barrel vibrations and jump. The jump affects both the alignment of the bullet entering the throat and the timing. The powder weight largely effects the time to bullet exit.
If one were serious about the best accuracy (I cannot claim to be since I am thrilled when the groups drop below 0.5 moa) then running through both to verify the sweet spot in both dimensions might be advisable.
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"To those who have fought and almost died for it, freedom has a flavor the protected will never know."
-- Author Unknown
"If at first you do succeed, try not to look astonished!" -- Milton Berle