let me say one can have a boatload of objective data that simply isn’t actionable or germane to a user’s needs.
Actually, that's true of powder selection for me.
When I first learned to reload for USPSA because most other match shooters told me reloading would shrink my groups even though I already tested various factory ammunition and selected PMC due to smaller groups it produced. And they were correct. My average reloads reduced group size by at least 40% over best of factory ammunition.
But I differed in powder selection. Many recommended Titegroup, some WST and few Clays and others WSF/HS-6 with W231/HP-38 seemingly the default by most. My bullseye match shooting mentor for reloading/match shooting said he used whatever powder/load that produced the smallest groups at 25/50 yards but since I was shooting "action pistol" USPSA, I needed to factor in recoil impulse for fast follow up shots.
So while Bullseye/WST/Titegroup produced smaller groups, W231/HP-38 produced lesser "felt recoil" or recoil snap/muzzle flip to return front sight back on target faster. When I mentioned this, some match shooters looked at me funny. Some nodded and said, "Makes sense". And some admitted they used whatever powder load combination that was the "cheapest" and Titegroup required smaller charges than most other popular powders ... penny pinchers.
Same for when I switched match caliber from 45ACP/9mm to 40S&W to better meet major/minor power factors with one caliber. While some still used fast Titegroup for 40S&W saying, "It works" ... I found WSF/HS-6 to produce recoil that was more of a push than snap. And for minor power factor loads or matches that weren't chrono'd, W231/HP-38 produced lighter felt recoil loads for 155/165/180 gr bullets.
So despite all the objective data I just posted, I shot USPSA matches using powders based on my "subjective" feel.
this is a forum not an “ask livelife” blog/column.
Yes it is. And these days, I refrain from posting on a thread to allow other members to tackle the question/problem posed and post if/when the answers provided weren't directly replying to the OP or going around the circle off topic.
And when I post, I take myself back 30 years just starting out to shoot USPSA and imagine what information I could have benefitted from; hence the 30 years worth of "real world" field/test data that were myth busted because not all information on the "internet" is "accurate".