For sale is an excellent takeoff barrel. Less than 150 rds through it before I pulled the barrel. Excellent shooter. Threaded 5/8-24, and includes the factory brake. 24" long, 1:11 twist. $150 shipped, offers considered.
It takes a crap ton of torque. This is the first Tikka barrel I've pulled without a parting groove ahead of the receiver face, since this barrel is too nice to scrap.