A couple of tricks told me by a very knowedgeable, but since gone, caster: in 22, stay with RN and FP over 50gr to shoot better, keep the molds very warm and only swing the sprue plate part way closed. Warm blocks to allow them to fill out. Partial sprue, when cut it distorts a smaller portion of the base and the base is the steering mechanism of a cast bullet. Better bases, better shooting. BOL BH