Tinker, I never use a filler and the only time I have put anything above the powder was 1/16th of a sheet of Charmin 1/4 inch above 12 grains of Unique in a 45-70 (it didn't make much difference). The 30-40 was using Federal Large Rifle Match primers and I really should run it through the chronograph some time but I would guess somewhere just over 1600 fps.