Help with ladder

[RockyMtnMT]

I've said this on other threads but right now there is a lot of hype about the lowest es. Worry about tuning the load to the barrel harmonics.
If vertical spread at long range becomes an issue then start looking to tighten your es

Anything under 30 es is going to be good to 1000y. Shooter and rifle must be exceptional to shoot the difference.

I would expect to see better group at 300y than what is shown in this thread even with the changing charge weight.

Steve

 

[LongBomber]

Just judging from the size of the dots- Your 76.8 are under 1/2moa of vertical from each other, and about 2 1/2" horizontal? I think I would try a 3 or 5 shot group at that charge and tune distance from the lands.