The only time I tried Blue Dot in 9mm (115gr jacketed), the Start Load and Do Not Exceed load were the same: 8 grains, Do Not Reduce.
Pretty loud and flashy out of my 3" barrel .... I decided there were better options.
What did the primers look like? I'd bet they may have backed out a bit....
I'd guess if this powder is "in the BlueDot neighborhood", it will work best at max load.
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