i have a new 308 mauser barrel that's like 19'', the chamber was buggered up. any thing to clean up the chamber is not the best with only 19'' and don't want it in a mauser anyway. i was thing of making a chamber insert for a sxs. i am on the look out for a newer sxs all mine are old. i thing i could do 7.62x39, 3030 would be easy tho. .