I have inherited an old .22 Hi Standard Supermatic Citation Hi Standard Inc E Hartford, Conn U.S.A is stamped on the barrel Any idea how to tell how old this firearm is and what it is worth? Last time this firearm was fired, it would stovepipe. I did some reasearch and learned this is common with this firearm the magazine feed lips need to be re-tuned. This is an ongoing process for the old High Standards. Spacing of about 0.236" +/- .002" is about right. Can I buy a replacement magazine that does not need to be re-tuned?