[Unclenick]

I think 24 grains will be getting to more normal load pressures, though a 2 grain jump is a lot in the .223. Half a grain per increase for testing is more normally used to ensure no pressure spike occurs. It depends on your fired case capacity, as I indicated earlier. That capacity will vary up to three grains of water capacity across brands of cases, which is significantly more than your human error will be on a proper loading scale. Even the Lee powder scoops will usually stay within half a grain or so, which is smaller than the differences in case capacity can be.