removing a thermally fit barrel?

[Winny94]

I am hoping to soon assemble my "ultimate 10/22". I have a Volquartsen Summit and a Shilen barrel. To install on a Summit, you need to test fit shims. The only way to fit the barrel is thermally, but I don't know how to remove barrels fit like that. Has anyone done this and have any tips?

 

[natdscott]

Un-thermal it?

Anschutz 54's barrels tend to be removed with Kroil, a brass rod, and a hammer.

But I dunno about an auto.