Before I say anything more - this is just math, and the OP has never mentioned shooting at a distance far enough for ES/SD to matter much if at all. If he stays 500 yards or in the ES/SD basically don't matter

*at all *and he'll gain significantly more improvement through range and wind call improvement on any given shot than changing up a load that prints decently. Muzzle velocity statistics and BC % variation are long-range (1200+ yard) topics, inside that range I agree that pretty much all that matters is the group size because that wraps up all the p[possible variables in a final result.

I use ATC instead of max spread for group size because it's more useful in layering results of multiple short strings, especially for something like a 300 RUM where if you care about the barrel you don't want to send 30 in a row down it without letting it cool down.

That said, here's some math that doesn't really matter:

Yes I agree that a 30FPS ES would be great..... the issue is that for

*all future shots* that his ES isn't really 31FPS, just like how in the 3-shot single digit ES/SDs that get posted the ES isn't really 1-9FPS.

The ES of his very few shots were 31fps, but the inference to be made from the small sample is that the ES of any future group of 5 shots will be ~75-100 FPS (5-6x SD around the mean velocity) - if he shoots enough of them he'll eventually get a huge ES.

Cal Zandt documented an SD 5.5/ ES 2 over 36 shots on a Lab Radar in one of his articles. That is an exceptional load because the ES is ~5x of SD, so the sample has already started to show normalization at the extreme ends. If the population has SD bands that matched a normal curve then he'd found a load that shows the type of consistency that will shoot well at long-range. Considering I think that was the 300 Norma he won the NF Steel Challenge with, that rifle worked out very well for him. But that was also shot at a distance where muzzle velocity stats mattered, not at or under 1000 yards.

Consistent muzzle velocity is key for long-range shooting, otherwise, bullets that leave the muzzle...

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