faving a few issues getting gun sighted in bullets are very were even using the rest(not a lead sled but similar)one minute it is hitting bulls the next its 3-4 inches high and to the right then  good up and down but way right then bottom left  its on paper every time at 100 yards but no grouping

here is the set up

thompson center pro hunter with a bdc scope  shootin 150 grains of tri[ple 7 pellets with a 250 grain t/c sabot bullet

any suggestions  this is not my gun but brothers and season starts sat. so tryin to get righjt for him  im goin to go play with it tomorow and see what i can get but i figure it has the best of everything it should be driving tacks with no prob

Try Blackhorn 209, I love it.   Win 209 primer, 100gr BH 209, Hornady SST 250 gr with red sabot. Have had great succcess. You can also shoot all day with no swabbing. My buddy shot 50 rds. and had as good of a group at the beginning as at the end  Not a patbh one!!

First off if it's accuracy you are looking for get away from the pellets and go with loose powder.

Pellets can have up to a 10% variation. Also, 150 grains is a lot of powder. I use 250 grain Hornady SST sabots with 100 grains of loose 777 and can hold 1” groups all day at 100 yards with my TC Omega.