It won’t be at long range. Seeing 30fps between 42.8 and 43.0, loading at 42.9 with gear capable of +/-0.1grn means you’ll risk ~6” of extra vertical stringing at 1,000 yards.
If you’re only playing with short range shooting, then long range load development methods we’ve been discussing aren’t of use.
So we’re back into the same trap I warned of in the first page - three shot groups at short range are too vulnerable to mechanical errors, and don’t sufficiently compare the actual ballistic performance of the respective rounds. A guy gets caught up on a tiny group or a small vertical shift, but when we have a half dozen groups 1/2”-3/4” in size whose centers all land within ~1/4”-1/3” just doesn’t tell us anything of value. If those were 5 shot groups, or single shots (as in a ladder test), the analysis results could be completely different. Take out one dot of each color on my overlay above, how much does it shift everything around? Adding the Satterlee results is a means to improve the validity of a 100 yard test, but appropriate value must be given to the velocity in that case - aka, it can’t be ignored. So my bet would be 42.9 will give a lot of extra vertical at 600-1000 than 42.4.