Which ever one you pick, check the rifling.
Many great looking MN's have worn rifling at the throat. Mostly due to the age of the barrel, possibly the shoulder wrenching power of the 64R, but most probably due to the corrosive powder. The earlier owner of the rifle probably didn't know to pour ammonia down the barrel and over the bolt when finished at the range.
Clean as usual, but use the ammonia early to cut down on the power of the corrosive powder at the lans in the throat.
When choosing the lesser of two evils, choose the one that gets you home by 9 pm! The Gipper