I don't see why it would not stretch if you wrap your whole gun. If its just the strap that's to tight, just try a piece of fabric where the strap touches the hammer, that's assuming you can snap it at all (you didn't specify). If you also stretch the holster a little with that method (bagging), the gun should sit a little deeper in the holster, thus possibly allowing the strap the stretch enough. Sounds good in my head at least. Good luck.