I am pleased with the groups out of my 14" TC with the factory Hornady 140 grain monoflex. I was told by Hornady the minimum recommended velocity for the 140 to be 1600 fps which from my chronograph tests would put my max range at about 175 yards. Have I shot anything at that range? No, max shot for me has been hog at 75 yards, dropped in tracks.
YMMV