I'm just curious, what about the sabot do you not trust?

I shoot a TC thunderhawk carbine and have shot probably 70 or more sabot rounds without incident. But when I experimented, buffalo ballets, patched balls, maxi balls, all seemed to do poorly. All but the patched balls weren't tight enough in the bore (.50 cal), even with a wad back of the ballets. Mostly Pyrodex pellets but also played with FFg, various loads and combinations, having been spoiled by starting out my muzzleloading experience with a particularly nice Hawkin gun using Bp w/ patched balls.

Mine is 1:38, and 21" so I needed to drop down to 80g Pyro, versus 100 (2, 50g pellets). This helped burn all the powder but mostly helped with accuracy. I shot green sabots and Nosler .429 (.44 mag) 300g hollow points. With a 4x scope it groups about 2" at 100 yards.

I haven't needed a follow up shot, and usually have a cleaning routine with practicing anyway, where I always shoot from a clean bore. Maybe that's the trouble folks have with sabots. I have loaded 'em back to back w/out cleaning and not had any trouble I can recall.

What sort of trouble do folks have with the sabots?