06-09-2020, 10:28 PM
Are you loading cast bullets? That is what the M-die is set up to expand just the mouth to allow the larger size of a cast bullet to seat without shaving lead. I have a Lee universal sizing die set that I use for expanding for loading cast bullets but have not loaded any for the 6.5 Grendel. This die has little cones that stack on top of each other that have different tapers. You place the cone with the taper that will work for what you want and place it on the bottom and then adjust the die to give the bell on the case mouth you want.