Instead of using M-Dies or Expander Plugs, I found that using the Lee Universal Expander Dies with a single or progressive press, one can reload smokeless lead bullet reloads faster and when seating the bullets, the COAL's will be perfect ...
* FL size the brass which gives the ID of the case the needed diameter tension so the lead bullet will not slide into the case when seating - will be 0.001 to 0.002 the full length of the bullet
* Adjust the bullet seating die to the desired length so it will produce a slight crimp at the case before the driving band
* Create a bell on the case mouth with the Lee Universal so 1/2 of the bullet base sets the case before the powder charging step... there will be no lead stripping when the bullet is seated with the powder charge
... Then every drop of the handle press will seat the bullet at the exact COAL position - Fast , no slippage of the bullet into the case - Perfect reloads