The little .22 round is very gentle on the barrel, not being jacketed. I have a 1913 converted in 1920 it still shoots fine and bowls over rabbits as long as I can make them out through the sights. If it is a 1905 is it built on a Sht LE Mk1 reciever or is it on a Long Tom, it would be really nice if it has original wood to the reciever if you are really lucky then the magazine will have .22 stamped into the left side and the mag follower removed. On this site there is an article about .22 trainers which is quite good. They are great fun to shoot and are quite accurate as the barrels are very heavy for a .22. If you get I hope you put some pics up.