I had two TC Contender's in the Hornet. The first was a pistol, which made it about as effective as a .22 Mag, from a rifle, but less accurate than the .22 Mag. rifle.
Then, I sold it and bought one in the carbine. That was my second mistake. First barrel had to be sent back due to the bore being larger at the muzzle than at the breech (terrible accuracy and keyholing bullets). The second barrel shot better, but the throat was so long that I had to seat the bullets with so little left in the neck that I had to roll them around on a glass table to sort out the ones with the bullets in straight. I eventually got it to shoot after glass bedding the forend and free floating it in front of and behind the screw. If I fired more than 3 shots in quick succession, the barrel would heat up and it would start throwing shots.
I sold that POS and bought a Rem. 788 in .222 Rem, and all my troubles were over. Normally, the best groups I could get with the Hornet were the same as the worst I would shoot with the .222 Rem. with new cases, about 1 1/4" at 100 yards. (The chamber of the 788 was a bit on the large side of tolerances and once the cases were firefirmed, it would shoot 5 shots in around 5/8".)
I did have a friend who had a Browning HiWall in the Hornet which would group under 3/4" for 3 shots with his best loads at 100 yards. That one was worth having.