Didn' t fugue I' d have very much plastic fouling after three shots ? what type of cleaners good to get rid of it ?

Was using 90 gr. of pyrodex for the sabots and 85 for the round balls.

The first three sabots were hitting right in line but two inches lower then the round balls,
But after shooting the first three sabots the round ball were going ever where, and in you could not covering up there holes with a half dollar any more you would have to use a paper plate they had spread out so much.

I found first three sabots and they were intact but the sabot from the fourth shot had two of them fin' s off.

Temperature well it was HOT and I would shoot then walk the 50 yards down range then back load and shoot again.
And I was using cleaning patches soaked in Hope' s 9 plus in between every shot with the sabots and every other on the round balls.

Theses were the Cheap shots from last year picked them up for a buck and a half after season last year but I was looking at them this year and seen that they had different sabots then they had last year. which was the bad sabot' s this years or last or both ?