Sorry buck, you ate just swallowing the powder guys bs. Lets take the 9mm per speer #14. They list 15 powders for the 124gr bullet. So you are believing they tested the 50 suitable powders & came up with this list of 15, really? So why is WSF suitable for the 115gr & 147gr but not the 124gr?
Is it unsafe, is it not suitable or is it just they didnt publish the result? Unique & WSF are mearly identical. Unique is represented in all 3 bullets wts but not WSF. So you would believe one is good to go & the other not? My point, the powder/bullet guys are NOT testing every possible combo & even the ones they do test are not making it into their data base for whatever reason, but it is NOT because the combos are unsafe.
Again, i understand the caution of those that feel they aren't capable of extrapolation, but to declare it unsafe, sorry that is just chicken little sky is falling stuff. Man has to know his limitations. Many guys have been reloading for 30-40yrs, but 1 or 2 calibers, so a very narrow exp level. Some of us have the same 30-40urs, but 25-30 diff calibers, 1000s of bullet & powder combos. To pretend we dont know anything is laughable. We are still here, still in one piece, still reloading.