I've had this old Remington Rolling Block Saddle Ring Carbine for a number of years and I load for it and shoot it. It's chambered in 50-45 so I have to cut 50-70 brass and use 13 gr of Trail Boss. I've been told this is from the 1860's but I don't know. There are a few markings on it that I have no clue about. There is a B stamped on the barrel just forward of the receiver on the right side of the barrel and a crown of some sort on the barrel band. I was given this better than 50 years ago by a friend of the family because no one else wanted it. The barrel is 20.5 inches and appears to have a carbine rear sight. I've included some pics and I'm hoping someone can shed some light on this old gun. The targets shown in the pics are from 25 yards. Thanking every one100_1580.jpg100_1581.jpg in advance for any help with this. Best regards. Rich. 100_1145.jpg100_1147.jpg100_1579.jpg