3.6 grns. WW231 (HP38) is my favorite GSSF Load. About 875 FPS from a Glock M-17. I also agree with PPCSHOOTER's load of 4.0 grns. WSF, which gives about the same velocity as my WW231 load. Excellent paper punching and steel ringing loads. I should have used all the money that I've spent on CFE-Pistol and Auto Comp to buy more 231 or WSF.