My late father was a cast bullet fanatic. He loaded for quite a few .22 centerfires using cast bullets. I still have his molds and guns. My favorite for cast bullets is a Richard Marhoff drilling. The rifle barrel is chambered for .22 Savage Highpower Ackley Imp. Since the .22HP has a groove diameter of .228 the bullets drop from by Lyman molds at close to groove diam. I use 15gr of SR 4759 and a gas check. Shoots great. Makes a great grouse round (legal here in Idaho to shoot forest grouse with a rifle).