The Thompson Center Contender, Encore, and TCR-83/87 rifles are all switch barrel systems.

The Encore is the most versatile, like the Contender it easily goes from pistol to rifle and just any hunting caliber can be accommodated. At the shop we use an Encore as a test rig as custom chambered barrels are very easy to configure and set up with pressure transducers.

We have clients who use Stolle Panda and other high end bench rest actions where they have numerous barrels and bolts for an/each action - and they are very very accurate.

There are aftermarket bolts and bolt heads from Pacific Tool and Gague that help enable the transition of a factory bolt rifle to switch barrel application. The Savage barrel system has been applied to Winchester and Remington actions by many barrel makers (Remage barrel...) make quick work of getting a fellow on track for having a multi-caliber setup.

So many options!