Capt, your probabley right. I don't shoot the 7mmRUM but the .300RUM. What kinda advise are you looking for with your 300RUM. My load that shoot is 180 Nosler PT with 94gr of H1000 and 215 primer loaded out to 3.625COL. Its not the most accurate, but my main load. My most accurate so far was been 90gr of H1000 with 200gr A-frames with 215 Primer. But who can afford those bullets. Most of the .300 RUM's I have seen seem to shoot heavier bullets better.