I had shaving problems using Lyman M belling die and RCBS seating die in 9mm, .357 Sig, and .40 S&W dies. I found it wasn't the Lyman M die, but the RCBS seating die to be the culprit. When set to crimp it meant pushing the bullet a tad deeper into the case. That's when shaving occurred.
The solution was to back the RCBS seater off to not engage the crimp feature. Then get a Redding taper crimp die and crimp with that. It meant another trip through my single stage loader but it stopped the shaving.