I dont load .40, but my notes show 4.1gr of HP38/W231 works well under 125gr 9mm LRN at 1.125". I get 1040fps out of my P89.
edit- sorry, I forgot you were looking to switch to FMJ. Got this confused with another thread.
You will do well with HP38/W231 I am sure.
Last edited by tkglazie; May 24, 2012 at 05:57 PM.
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