I schooled my granddude on reloading his S&W M&P .40 on Sunday. We used some lead 155gr bullets from Midway and 5.5gr of W231 because I bought an 8# jug to use during this time (and probably until I die!) cuz I am a lo-volume loader. Junior hasn't gotten chance to try it out but they, theoretically, should be good. 5.5gr of W231 was right at or slightly below mid-range. I am waiting for his report.