I believe my ASC stainless steel 20 rounders measure 2.310". But I've also read the lip in the interior can peel up and decrease the COAL. I have some for 73gr ELDM and I winder them for seating out 75 gr ELDM's to 2.365"

While I can’t confirm the stainless asc can fit longer, I cut a window in mine for 2.350”, I can confirm the aluminum ASC 10 rounder can NOT fit 2.300”