The liner idea works great. My father has done it on several .22's and a bunch of muzzleloaders. I have a 45 cal cap lock I got for $50 with a worn out barrel he lined with a $25 .36 cal barrel and pow! $75 rifle. I went down to .36 cal to match a pistol I have. Heck, he even turned one of our Crack shots into a .22 mag
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