I don't own a revolver, but for 9mm:
Testing and working up loads for 115 and 124gr plated, if I went over 5.2-5.3 I got powder flakes all over the place from the unburned(?) powder.
5-5.2gr was my happy-place w/ 124gr plated, and it works well for me(, even if Alliant states 5.7gr is the load for LRN (125gr) load on their site: http://www.alliantpowder.com/reloade...3&bulletid=327 )
I generally cross-reference a powder MFR's site for load data... if it's available.
Testing and working up loads for 115 and 124gr plated, if I went over 5.2-5.3 I got powder flakes all over the place from the unburned(?) powder.
5-5.2gr was my happy-place w/ 124gr plated, and it works well for me(, even if Alliant states 5.7gr is the load for LRN (125gr) load on their site: http://www.alliantpowder.com/reloade...3&bulletid=327 )
I generally cross-reference a powder MFR's site for load data... if it's available.

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