I only have 3 Contender barrels right now.
1) 21" .22 K-Hornet from Ed's Contenders, marked T/C Custom Shop. I forget exactly which scope I bought to put on this one, but I think it was a Bushnell.
2) 14" 7-30 Waters barrel with 7x Burris scope
3) 14" .223 Remington barrel with 2-7x Simmons scope and what looks like (but may not be) a Bullberry brake.
I really don't like the .223 barrel, predominantly because of the brake. I dislike muzzle brakes in general, and especially on a gun that doesn't kick enough to justify it, but the .223 barrel is the one that came with my first frame, which is why I have it. I may eventually get around to selling/trading it off to finance (in part or whole) the acquisition of a 10" .32 H&R, .256 Winchester Mag, .22 Jet, or maybe .218 Bee barrel, but I haven't decided which one to start with.