First is to figure why it cracked. Eliminate the cause and your repair should last. If it is not inleted properly it will return. Might be time to glass bed the head of the stock. I use pins only if the wood has chipped off and I want mechanical retention within the repair. I tried one of those biscuits that are used in wood working. Not a good idea as they expand when the set. Made the wood swell slightly over the repair. Held well and lasted for ten years so far.