T/C had some problems with sabot being made a little to big but it sounds like you are having trouble with other mfg as well.

I could not even load the Shockwaves I bought this fall in my Encore I ended up twice having to take the gun apart and and use a block of wood and hammer to drive the things out the breech. I know some sabots are tight but this was incredeble.

I called T/C and they said some of the sabots made for them were oversized and they will send you some free ones to fix the problem.

BTW I use a T-handle screwed onto the end of my ram rod while shooting at the range and have a little block of wood with a 3/8 hole about half way through it to put on top of the ram rod when reloading in the field.

Sabots are great but you have to put up with some hard loading while you experiment.