300 wsm 190 impact

67.5gr of H4831SC and Norma brass looks promising for me with ~2780fps and SDs of 8-12 fps out of my 20" 1:11 barrel Tikka. Generally get 5-shot groups with 3-4 touching shots with one "flier" that may be due to some neck tension inconsistencies that I'm ironing out. Yes, I understand shot dispersion and sample size.

There's also mention of H4350 in this recent 300 WSM load discussion thread: https://rokslide.com/forums/threads/300-wsm-load-recommendation.344448/post-3518815
 
Don't have anything to help you with but have thought this bullet would be an excellent choice in a 300 WSM even in the 1 in 11 Tikkas. Be just as good in your 1 in 9 twist.
 
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