I have a custom switch barrel rifle being built right now, and the chassis that I picked up takes what I call super magnum magazines (3.850" long) and the follower/feed lips is set up for 300 Win Mag. The switch barrel action is a long action, and I intend to set it up to shoot 6mm creedmoor and 300 Win mag. So, I need to alter a long action magazine to feed the 6mm CM rounds (~.473). Am I taking on a difficult or impossible task, or is it fairly simple, and without high potential for failure. I intend to use Accurate magazines, as they are recommended by the chassis manufacturer. Can you change the follower in the accurate magazines? Will I need to? How hard is it to manipulate the feed lips on an Accurate magazine? Thanks for the help.