My load for my 55 cord 450/400 is a 400 grain Woodleigh, 62 grains of RL-15 plus 2-3 grains of Dacron Poly filler. Lately I have sqitched over to the Kynoch foam wads. They are much easier that weighing each tuft of Dacron.

This load also shoots same POA for 300 grain Hawks. .035 jackets.