Shot my T/C & Optima for the past two days. I have been using QT 44 250 in my T/C and has always shot great with them and 80 gr of T7. Tried the Optima with powerbelts and could not get a group to save my life. So I tried the QT's and it is dead on now. Both gun holding dead center about 3" high at 50 yds. all holes touching each other. Most of our hunting is no more than 75yds so I think my son and I should be good to go. Oh 80 gr in the Optima to.