I just loaded 200 hundred with these formula, after trying several today.
As you said, 4.3 grs was not realiable at all, with lots of stove pipes and sometime not even ejecting. Thanks again for the info! very helpful. Also, I have tried all different COLs, being 1.125 the most reliable.
Thank you!
No sweat, yep, 124gr/4.3gr WSF/1.125" is very mild (too mild). 4.7gr should be reliable in your M&P IME.