I recall reading in Shooting Times 30 years ago or so that Blue Dot can be funny in cold weather, the author said he saw signs of high pressure such as
flattened primers, e.g. I found Blue Dot worked great with jacketed bullets but
not with lead bullets. My all around favorite .357 load is a 158 gr SWC over
13.5-14 grains of 2400. I go for accuracy rather than power.
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