Q:

I have an Ithaca M-37 problem. I purchased a used Ithaca m-37 deer slayer. It’s a 1970 gun in great condition (little use). When I took it out to sight in with slugs, after each shot the action opened up slightly (2-inches, the slide came back part way but the shell was not ejected) but no gas escaped. To confuse the issue, I have a regular field barrel for it (28" modified) and with regular field loads (2 3/4 number 6 lead) the gun operates normally. (i.e. the action stays closed until I shuck a new round) I called Ithaca and they said to send them the gun. Before I go to the extra expense of shipping the gun does anyone have any ideas of the broken part or other??? Thanks!