I've found it's hard NOT to get a bullet to shoot well in my two T3's in 6.5x55. I've had great groups with 100 BT, 129 and 140 Interloks, 140 Partions, 130 Accubonds and TSX's. Also 120 TTSX's.
So try as I might to find a bullet that will not shoot great, I've given up in failure.