I have only one thing to add to Patrick's advice and that is to check for a cracked reciever ring, especially where it is hidden by the stock. There's a thread a few pages back that discusses this issue and it would be worth your while to read through it, '' my first 1917 with a crack'' by chuckindenver. Appearently if a 1917 is reberrelled improperly it can/will cause the receiver ring to develope a crack(s).