I have an original 86 in 38-56 and use a BACO mold that comes out at .3795 I shoot it unsized and do not have any problem getting 2" groups at 200 yds. If you would like I will check the mold # and the load I use and post it later. wM1
PS I think the bore on mine is .381
2" at 200 yds. using BP in a lever action with iron sights?