bigcountry
If you e-mail Del Ramsey @ mmp and ask the same question I am sure he will confirm for you in most instances...
In the old days of older plastic sabots and the days when the lands and grooves of the bore were deep - or if you still have a gun with deep grooves you would be correct, but since everyone went to the shallow grooves and the advent of polymere which will conform easily to those grooves - loading is an easy task...
TC Super Glides sabots (actually contracted to and made by MMP) are areally good example of this new technology. I have not used them myself but they were built for TC to go down their barrels easily...