I have a TC Triumph that I have never been able to sight in. I started out with 777 using TC Sabots and it seemed to shot ok, but the sabots were a royal pain to load. I went to the range yesterday and was all over the board. I cleaned the gun, changed the breech plug, and didn't make any difference. I am using White Hots powder, Kleanbore 209 primers, and Powerbelts 295 grain. I cannot get a pattern. I know it's not me because I sighted in my 223 in less than 20 shots. Any suggestions would be greatly appreciated.