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https://www.budsgunshop.com/catalog/product_info.php/products_id/718001187 These are compatible . https://www.budsgunshop.com/catalog/product_info.php/products_id/33281#guaranteed_compatability

I cant recommend anything for the 12 gauge without knowing what you want to do with it but In general home defense use Buckshot, Deer use Buckshot/slugs, Bird hunting use shot sizes to match the gamebird you are hunting. Trap/skeet shot sizes 7.5 8 or 9. Waterfowl require the use of non lead shot so you would need steel shot or heavishot. for most of my shotshells I watch for sales at local stores like (S)eild and (f)tream swap the s and f