10.7gr trailboss works well for the 190gr subs. Sorry no data for the 175gr ones.
My best bet would be to get a chrono (garmin) and just shoot a couple. start drom the top, lower in 1 or 0.5 gr increments to quickly get you into the ballpark. should only require 3 or 4 bullets. After that interpolating should get you close enough to the actual velocity.
For me the 190 shoot sub-moa at 50m but range is severely limited, so inwould not worry too greatly about accuracy
I guess you will be subsonic somewhere around 9gr (just a guestimate and might be completely off)
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