I'm getting 1920 fps using 48 gr of H4198, a fed 210 primer and a 405 gr Cast Performance. This is with my 1895 guide gun. I bet if you used a little less than my 48 gr you'd get what you are after. I'd try 46 gr. that is a start load for 400 gr bullet.
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Insanity: doing the same thing over and over again and expecting different results
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