I've been running both the 73 & 75 ELDM's over TAC for several years now in a 26" Criterion 1 in 8" Wylde chambered barrel. COAL for both loads is around the max length of the MDT polymer mags I use, which are 2.550in IIRC. My charge weight is the same for both bullets, 25.15gr. I use CCI41's...