The \”plunk test\” is a good idea to find your OAL. After that I sample test as I\’m loading. I had great results with W231. 4.2grs was averaging 1065fps in my M&P 5\” Pro, slightly higher in my Walther PPQ 5\” Match, slightly lower in my 1911 5\” Springfield RO. Sport Pistol is my GO TO powder but became very scarce for a year or two. I also had some very good results with \”Titegroup\”.
W231 4.2grs., Sport Pistol 4.1, Titegroup 4.0 . All should put you in 132 Power factor range ideal for competitive sport shooting.
Oh yeah, my \”sweet length\” to run all my 9s with this 124 TC MW is 1.09 – .005 . Great Bullet! Makes nice holes in IDPA targets.

Campcook
Unityville PA