I have run 7, and 7.5 grains of PP through my Triple Lock and 24-3 under a Lyman 429421 that weighed 260 as sized and lubed, and the 7.5 grain load turned up 765 fps ave in both at 15'. The TL has a 5" bbl., while the 24-3 wears a 4" tube.
Using a Dry Creek 240 cast swc, they both turned in an average of 790 fps at 15'.
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