Grip problem...

[dfm]

I'm having continual problems with my right grip on a 70's Mauser Parabellum, Swiss type. After purchase I noticed it was a bit loose and always shifted forward when handling/shooting. The two brass pins kept it on the gun but the grip would still shift around.

I sent the grips to Hugh C. to have them recut and ordered a pair of plastic ones from Vintage Gun Grips to use in the interim. Well, long story short, they do the same thing. In fact, I'm on my second right panel as the two pins (plastic nubs in this case) have sheared off on both panels.

I reload but everything is to standard specs. The gun shoots fantastically well but this grip problem is driving me crazy. I've got electrical tape holding body and soul together for now. Short of gluing it on can anyone offer any tips/recommendations for getting the darn thing to stay put.