RE: Lapping/Seasoning
If they did go to a true standard bore sizefor muzzleloaders, think of the effect it could make on the projectile industry. We would not have to purchase hundreds of dollars worth of this bullet or sabot and try to see what the rifle likes. Just go to the store and pick out the one design that suits your hunting needs and work you load. Sure would cut down on bullet sales. Some might even go out of business or have to bring their prices out of the clouds. Actually I might be over simplifying it a bit, but it would make a difference.
With the old traditional style rifles that shot patch and ball, this was not such a big deal. We just increased the thickness or the patch or the size of the ball. Once the load was found the rest was kind of easy. You loaded and shot. I would hate to think how many different styles and weights of muzzleloader bullets I have tried in all my different rifles... I have a medium sized cabinet full of different bullets.