You need to listen to Tahquamenon, cayugadand the other 80% of the folks on this board and go with this set up to start.

Two 50 grain pellets of 777 and a 250 grain Shockwave (It is just a good place to start)

Shoot this until you are confident and capable at 100 yards, then go to 150. Then start working your way to 200. Your gun may or may not do well past 150 with this load. I am not trying to be insulting, but you aren't ready to be making ethical shots at 200 yards at this point with that gun.

There is another little variable that sometimes escapes people. Shooting sabots in a hot gun or during hot weather. Don't know where you are from, but temps in the 80s still are the norm in the south. Sabots in hot barrels and during hot weather can result in erratic results. Pick a cool, calm morning to do your sighting in, give your barrel time to cool, I think your results will improve.


The problem is that you are trying too many things and can't figure out where the problem is. While every gun is different and the load above may not be the absoloute best for your setup, I would be willing to put money on it that it would provide very acceptable accuracy to 150 yards, providing you do your part (consistant shooting technique, consistant cleaning between shots, consistant loading technique, etc). Start from a known position and then work up from there.
R
Hank