I'm in the process of developing an idea for my first custom rifle build. I've been doing a ton of reading and I think I've pretty much decided on everything but the actions and the caliber. I know I want it based on the short mag case but can't decide between the .264, .277 or .284. Everyting I've read and my preference for the 3 position safety has led me to the Model 1999 Montana action. Any experience or thoughts on this action? Any other recommendations. The build is going to become my primary deer/antelope hunting rifle if that helps. Thanks.