Can't offer any technical support to my 2cents worth, because a friend reloads for me. But, he says all his experimentation has led him to loading me up 2209 powder and using Sierra SPBT 140g for hunting Sika/Fallow. Nice grouping at 100 or at my zero of 165m. But I asked him to load me up a heavier bullet for Red stags... Norma 156gn is so stable i shoot moa groups at 100m (when my mood is right!) and chrony says only 2560fps. Deer drop like a stone too.
I add this comment because I found that lighter Hornady SST projectiles were horribly unstable and inconsistent in my rifle, so bad sometimes that I wouldn't even attempt a head shot or long range shit past 100m with them. Hope this helps
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