Before you use the rifle again, check for a crack behind the tang. A crack might appear to be a faint line which does not follow the grain of the wood from the tang screw extending into the pistol grip - it is important to check both the top and underside of the stock. Although less likely, also check for a forearm crack on the underside of the stock. If everything looks normal, I suggest you take the action out of the stock, and with light outward pressure in the magazine recess see if a crack appears.