I too don't quite understand, but if you are referring to normal rifle bullets the question is stabilization. Regular rifle bullets are, for the most part, shot out of faster twists (1-8" to 1-14"). A 1-28" ML barrel will not stabilize them and they'll tumble after exiting the barrel.
I got ahold of some .50-.308 sabots once and used the shorted .308 spitzer I could find...keyholed at 20 yards.
I do know a few people fitting fast-twist .45 barrels (1-14") to the Savage smokeless ML. I'm waiting to hear on the results as I've wanted to try that on a regular ML.