My standard 9mm load using 135RN Bear Creek moly bullets is 4.0 WST at 1.150 OAL. I have loaded and shot thousands upon thousands. Very soft shooting and accurate, very little smoke. The last State IDPA match I competed in my loads chronographed at 1020, 1020, 1005 respectively.
I have never had any issues with pressure signs and have chronoed in both summer and winter with very little if any variance.
I use this load for both my STS Spartan 9mm and Glock G34 with a LWD barrel.
First my credentials, I shoot 9 major, loading 10gr of AA#7 behind a 125gr Zero JHP in a 9 mm luger, says I don't follow the rules, take chances, play outside the toy box etc.
I had to load some 9 mm for the Area 8 Championship a couple years ago for my Marine Son In Law, so I had wst and some RN 124gr Montana golds so since I didn't have his gun to test with I used one of my 4" guns, with his 5" he wold be good if I took it to 130-135pf.
Now the rest of the story. To make a good 135pf Minor with 124gr MTG jacketed I had to work up to 4.7gr. The ES and SD were not very good but acceptable and the accuracy was good enought. In looking at the condition of the primers and there were CCI and the brass it was obvious to me that this round was a bit over the normal pressure range but no where near what my 9 major loads do to a primer or case. I could get to the same PF with only 4.3gr of TiteGroup for comparison. The recoil was similar from both. I went with the WST since I've shot a ton of it in 40 and 45. Bottom line, use N320 way better shooting more consistent and way less pressure, if you are a pressure phobic, use 4.8gr of IMR7625, suprizingly nice low recoil shooting.
Now the reason I quoted is I shoot some 9 minor using WST and Bayou 135gr Bullets, and the same charge 4.0 gr, very nice shooting and accurate.
Bottom line, use N320 with Jaketed bullets way better shooting more consistent and way less pressure, if you are a pressure phobic, use 4.8gr of IMR7625.
For Moly bullets like Bayou 135gr I think you can get very good performance at safe pressures. I've not done the 147gr or 160gr with WST but why go there when the 135gr is so sweet.