Ive worked up a load in the 300 rum using the 230 berger hybrid target bullet. I found a very accurate load using h50. my velocity is 2911 with an extreme spread of 8 fps. as I increased the powder charge by about 4 grains in .5 increments, the speed didn't change much but the extreme spread did. my question... is anyone using a different powder getting stable readings and shooting this bullet much faster than this and remaining accurate?