I know what you mean about tough to seat sabot loads. My solution has been Powerbelts. In three different muzzleloaders they have been very accurate, easy to load, and devastating on deer. My standard deer load is 100 grains of Triple 7 and a 295 Powerbelt hollowpoint. This load shoots into an inch in my Encore, and I can load three shots in the field without having to swab the barrel, no appreciable change in accuracy either. My standard range practice is to fire a shot, spit patch the barrel followed by a dry patch. Much has been said here about Powerbelts, both good and bad. For me they have been wonderful. I also replaced the breech plug of my Encore with the .25 ACP coversion unit. You'll find several threads about that here also. The conversion makes loading and cleaning easier and has eliminated the occasional flyer I sometimes got at the range. I would suggest at least giving the Powerbelts a try. A $12 pack is a small investment that might make your muzzleloading easier and more enjoyable.
scienceguy