Hornady 4th only shows WST data for their jacketed bullets in
90 XTP 5.5~6.0gr.Max 1.08"@1200fps
100 FMJ 5.2~6.2gr.Max 1.105"@1200fps
115 XTP 5.2~5.6gr.Max 1.05"@1150fps
124 FMJ 4.8~5.4gr.Max 1.15"@1100fps

Remember that this is 1991 data and they were still using CUP which often turned out to be higher pressure when remeasured under the PSI system. Not saying it's unsafe but a lot of these old loads were later dropped or reduced.

I too just picked up a pound of WST to try in 9mm (by mistake, I couldn't remember if I wanted WST or WSF) with 124gr Berry's. I have searched a number of forums and come up with several loads in the low to mid 4 gr range, nothing over 5 gr so that Hornady info may be a little warm.

The one load for 147gr I found on Brian Enos forum didn't specify if it was for lead, plated or jacketed and also didn't say what type of bullet but they did say they started at 3.5gr and went up as high as 3.8

Again... this is internet data and can't be trusted as safe until you work it up yourself.
Watch your OAL too and go as long as possible.

With my 124's I'm trying 4.2 & 4.5 gr to see how it chronos