I use WST a lot in different calibers . If it was up to me , I would use 4.0 and work up . I have used 6.0 grs with a 245 gr swc ( Keith bullet , HG 503) for about 900 fps . Sounds like a chronograph is necessary to achieve that exact velocity . You didn't mention bullet weight ? Regards, Paul
Last edited by cowboy4evr; 04-18-2018 at 10:55 AM.
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