Plenty of recipes up on Hodgdons. There is no need for black powder in a 1947 Smith. That gun was made well after the invention of nitro powder and magnum loads. I'm shooting loads up to 8,000 psi, but limit it to 1-1/8oz at 1250fps in my 1910. In my 1949, I shoot reloads, but wouldn't hesitate to shoot any commercial lead shell I could fit into the chamber. Glassbedding is not so hard, I recommend you give it a go. As to cracking stocks, ignore the naysayers. That Smith is built like a vault door. Treat the wood nice and it will last a very long time. There are plenty of Parkers, Ithacas, Foxes, and Lefevers with rotted oil-soaked heads full of cracks.