I did one exactly like Wolfer a bubbaed mauser with no rifling I cut back 6 inches trying to find a little better rifling cut with hacksaw filed strait crowned with a carriage bolt and valve grinding compound it shoots good and a lot better than it did before someday it will get a new barrel just couldn't right now
Lets not fool ourselfs f that just because a tool is sold it is automatically better or more accurate there was a time when craftsman built things with what they had and quality did not suffer