Hey fellas....a few days back I posted a question regarding the build of a 7mm WSM on a short action. If this quest falls through, then I'll settle on the long action. I'm trying to exaust all resources first. I noticed defiance had 2 different short actions. A med and Xmed. On bugholes.com, they have a short action and it says the port is .400 longer than remingtons. Is that the ejection port I assume or the mag well port?? Anyone have these actions and mag port dimensions? Trying to run this build mag fed. Thanks