I would want to see the Model 12 stocks and how they felt. If you like them, then I would start going that route. I am not familiar with these rifles, so I do not know if they have a magazine in them or not. The Savage Model 10 tactical rifles that use the MDT chassis do not ride bags well. I have a very similar setup and I wouldn't use it for the purpose that you're prescribing. Otherwise I would look at either another platform entirely, or a custom build on a Savage action.