Is there any way to increase the enthusiasm with which the Mark X kicks 'em out?

Pull the bolt back faster. Sorry, not trying to be a smarta$$. But, it is a matter of the speed at which the case hits the ejector. If there is another way I'm not aware of it. Personally I like being able to control how fast the empties leave.

I have made and installed longer ejectors, cures the lazy cases coming out of the action. Don't need much extra length, 1/16" or so is enough. Angle has to be correct. I use a heat treated spring steel.

John thanks for the tip.