Have been using a LEE .430 310 gr RNFP GC for several years. Bullets actually weigh 316 gr. Cast of wheelweights and tempered, it shoots great in my 10" Contender over a max load of H 110, and when cast of pure lead (and minus the GC) and used in Harvester sabots (over 90 gr 3F in my .50 cal) makes a heck of an effective muzzle loader projectile for deer. Have taken four deer with it (all one shot kills), and have yet to recover a bullet. My son's Ruger SBH likes it when scoped, but doesn't have enough elevation ajustment in rear sight to shoot with open sights (needs taller front sight).