RE: 243 100 grain Nos partition
Well, I have interchanged these powders directly one for the other and I have noticed changes of under 50 FPS between them. The accureacy hasnt been affected though. POI seems to be the same as well. But, I am only doing two loads with this, 40 grains for 243 and 57 grians for 30-06. Seems to work pretty well, but I do try to stick with the IMR as a constant. EJ