I got a chance last week to get out to Ron's (RMW XTREME)  and planned to run some ammo thru the DI 10mm but in my hast to get out there I forgot to gram my 10mm...
But while I was out there Ron let me play with his 460 Rowland I have shot the Rowland in the past but he had it on his Glock mag lower (from New Frontier Armory) and ran several loads thru it from 185gr to 260gr and had 0 issues, even mixed up ammo in a mag and it ran like a sewing machine. I need another upper like I need another hole in my head BUT I may have to order one after I get a couple of projects completed.
RMW XTREME DI 460 Rowland