The rear of the drop box magazine on my 111 International Trophy Hunter is quite loose and it's driving me crazy. The rear part of the magazine has a little tang (on the metal body of mag) but I don't really see anything inside the stock for it sit on. The front clips in nice and tight and flush, but the rear is sagging. Any ideas? I Just bought this rifle very lightly used. I'm very happy with it, minus the DBM issue. It's a 7mm Rem Mag with synthetic stock if that helps.

I'd appreciate any help