I used the AA Plus left after shotshell trials in .38 Special, on the grounds that the ammo would be shot in .357 magnum revolvers so there would be a large safety margin.
Most at
158 gr lead + 3.6 gr AA+ = 768 - 816 fps depending on bullet whether wax-lubed cast or moly coated, and gun whether 4" Colt or 5" S&W.
NOT A PUBLISHED OR PRESSURE TESTED LOAD, JUST ME AND MY CHRONOGRAPH.
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