In using W C 860 along with 5 grains of 4227 as a “kicker” I have obtained velocity levels in both the .30-06 and .375 H & H around 2400 f/s and would like to reduce this velocity somewhat in order to attempt to improve accuracy… is the use of an inert filler acceptable in order to reduce the 860 powder charge and still maintain compression of the .4227? Nobade’s “ filler with an attitude “ is working very very well and I think I need to slow it down a bit.