Don't worry about velocity just work on the accuracy work up a few 10ths of a grain and see it the accuracy improves or not, then shoot in at 200m and 300m
you can work out the velocity by the drop you get,
I am at Tokoroa if you want to chronograph your load we can go to the TSSC on a weekday if you like, Visitor Fee is $10 for the day
Cheers
Robert.
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