Noticed one of these in the Midway Master catalog, chambered in 300 RSAUM, way cool cartridge to load for, better than the wsm's, due to the longer case neck. But my question is, how will this rebated rim cartridge feed from a magazine? I'm hoping that small base dies won't be necessary, and being an avid shooter, how will this action stand up to magnum loads? I already reload for 300 WBY, so I have powder, bullets and primers galore. All I have read about the DPMS rifles have been advertisements, so was hoping someone on this forum may have experience with this weapon, and pass advice on to me. I have an urge to get me one, for Zombies and the occasional Elk if I get lucky. Thanks fellers.