I was using W231 in my 9MM or should say trying to use.Was not happy with results at all. Got as high as 4.5 grains and was still getting keyholeing at 15 yards with 115 grain remington FMJ. Tried 124 grain LRN and still had the problem with 4.5 grains but not as bad.Think I want to try H110 but haven't got around to getting it yet.