I'm a traditionalist and can't bring myself to shoot sabots let alone in-lines...
I can probly 20 shots of .50 cal RB using bore butter on the patches vs 10 shots and I have to swab with Mooses Milk. And I shoot .58 Mini balls all day. With out swabing. With patches kinda like the bore butter based lube pills the bore gets cleaned and seasoned every shot...kinda sorta.