There have been many instances of guns being put back into service with holes in the barrel (half ways or more down the barrel, where the presure has weakend considerably) usually they were brazed shut and in several cases they were used as is without any problems. Several examples have been posted on this board over the last few years. I think rather then just write it off as a wall hanger, he should take it to an experienced gunsmith who specializes in doubles and let the gunsmith decide.
Steve
BTW the Dixie Gunworks catalogue has service loads for ML's posted in it (plus much other good information).
Last edited by Rockdoc; 12/21/07 05:47 PM.