OK, understand that you are dealing with an (or another?) engineer here. If I have one reloaded cartridge, say an FTX 250 with the powder, primer, etc., all the same, then I understand that I would shoot one round on each of the four targets in sequence, then repeat until I have 5 rounds on each target. That seems clear.
If I have reloaded two rounds, say an FTX 225 and an FTX 250, everything else is the same, then would I shoot one of the 250's on target #1, then one of the 225's on #2, 250 on #3, 225 on #4, then repeat until I have five rounds on each target? Each target would have the same rounds shot at it - 250's on #'s 1 and 3; 225's on #'s 2 and 4. Is that correct?
What if I have an odd number or different rounds, say 250's and 225's with different crimps? If I do a round robin, I could end up with mixed rounds on the same target - #1 could have a couple of 250's with a taper crimp, a 225 with a roll crimp (this is just an example), a 225 with a taper crimp and a 250 with a roll crimp, #2 could have different mix, etc. Or do I want to keep all of the same loads on each target, but just shoot them in sequence?
This could be a dumb question
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