Re: 45 long colt question
Just took a quick look in a Speer manual.
250 lead bullet was 11.9 to 12.9 grains.
225 to 260 Jacketed bullet was 12.0 to 13.0 grains..
So, your 12.9 is the max load, but it's safe, according to Speer. Normally, online sites only list the max load, and you are supposed to reduce it by 10% for a starting load. That would be starting at around 11.6 grains.
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