You want Stephen Redgwell's book 'shooting the 303 British' He lists some loads for the sierra 180, Varget (2208) min 36.5grns @ 2074fps, max 40.5grns 2288fps, H4350(2209) min 42grns @2101fps, max 46grns @ 2283, Alliant R15 min 39.5@2255, max 43.5@2435fps. So there you go look at powders around the reloader 15. Just checked ADI and they list 2209 at 48grns @ 2500fps
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