I found a used Marlin 39A for sale in a pawn shop about a year ago. Probably about 90%. It is an older 39A (1965 I think) with a cheap 4X scope on it. I do have some feeding problems with it. Feeds a little rough and completely jams about every 20-30 rounds or so. It is still my favorite .22 and one of my most accurate. Any suggestions on the feeding?