This has been the year of the inaccurate rifle for me. My TC Encore (a centerfire) has been acting up something horrible.

I moved back to VA in late 2006, but was here for the blackpowder season this year. I broke out the old Knight LK-93 Wolverine, the 300gr Sabots and put a new Nikon Prostaff 2-7x32 on top. I'm shooting 90 (100gr was even a worse shooter) of pyrodex powder with a RWS no 11 cap. At 75 yards, off a lead sled, my groups were a vast 6 inches center to center. Thats the best I could get it to do with what I had. I tried conical bullets, round balls, and some 240gr bullets. Whats the deal here, I seem to remember this gun shooting much better than this. Should I try and accurize this thing? How do you do that with an inline Muzzleloader like this? Should I just scrap the thing?