Critch,
All of the powder manufactures have web pages and if your cheap, and on line, they are about the best place to get safe loadimg data.
As for accuracy with the 40 gn. bullets, probibly extreemly poor. For the 40 gners. you would want something like a 1 in 16 twist. Your gun will be alot more accurate with 60 gn. bullets.
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Catfish
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