A lighter bullet of stout construction going fast,:3100fps(130 TTSX - 125 Accubond) or a heavier but frangible with better bc, going slower: 2650 - 2750 (168-178 Amax), with a shorter barrel you put yourself in the wrong weight range at the 150 mark, shy on BC, shy on outright velocity, shy on SD. 2206h is a great powder for shorter barrels with heavier pills, H335 is a great powder for the lighter pills, W748 is a good allround .308 powder, but slower than the other two.
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