Ive been playing around with a new bullet. I have the VLD down and shooting nice in my 270 A bolt SS. Now I'm toying with the sought after nosler 150 ALRB. I have it close but a question on velocity: At .050 off (coal of 3.402 56.5 IMR 7828 ssc ) at 100 yd. a five shot group will get me 4of 5 inside a dime at 100 and 5 for 5 in a nickel with a mean velocity of 2940 FPS. I've verified this 3 times. Go .5 grains up to 57.0 it falls apart, move the coal 5 thou either way regardless of charge it falls apart. The question is given most powders, a little more room will generate a little more expansion and pressure, am I thinking backwards on bumping the powder trying to get the magic 3000FPS? I know this is the case with pyrotechnic powders, would I be better to try 56.0 gr.at the 3.402 and not come apart?