Case gauge the ammo first. Case gauge before you do anything else. Small base dies doesn't mean its right check it. Or spent a bunch of time and money changing things. CASE GAUGE.
Whiskey arms
I have 4 of em they are great . 2 in guns of mine, 2 in guns of my wife's . Thousands of rounds on all of em.
https://whiskeyarms.com/products/lbc
Use the new pmags and forget about base pads.
buy 3 mag for same price as one TF or one TT pad.
http://www.primaryarms.com/mpi-pmag-gl9-9mm-21rd-mag661