I have the same rifle. The first thing I would suggest is contacting T/C to see what they suggest. Personally I shoot loose powder out of mine.



Mine has the fiber optic sights. I used a six o'clock hole on the sights until the laws changed and now there is a 4x32mm Simmons Pro Diamond scope on it.




This is my load of course. And it is a good shooter with 110 grains of powder.

Try to bury that front sight further down into the sight for now. Also I would try loose powder. Start at 100 grains or use two pellets. Three pellets is a lot of power.