This is my second season using 3.4 WST with 147 Ibeji FP 1.130 oal CCI primers, 8/23/17 out of my 5" R/O at 78deg 878 fps 40 es 16 sd . stock spring cycles well, soft shooting, very accurate, fills case well, good supply in my area. Chrono slightly faster out of XDM 5.25. This set up has worked well for me. The same day also tested 3.9 Power pistol with 147 ibeji at 1.130 pleasantly surprised with 910 fps 22es 9sd out of R/O, very soft shooting, seems very accurate cycles well will test more.