HI I don't post much but I thought you might be interested in this insert I made for my new 38-50 Rem Hepburn. It took me 2 years to make the rifle. I got it shooting and I planed on using it at Alliance this May shoot but my wife became ill and so I had to make other plans. So I looked up to see if anybody made a 22 insert for a 375 cal.bpcr.
I couldn't fine any so that got me to thinking how to do it. I found that Mid Way has barrel liners and they have one that's 5/16 in dia. for under $40. so heres is what I came up with and how it's shooting.
Don't pick on me for the finish on the brass this was a test not an end product .
Gerald C