Let me recommend not using Blue Dot for much of anything. It is not a flexible powder. Caused severe leading in my 357 with cast bullets at velocities which 2400 or AA#9 did not create leading. It is no good at reduced loads, I have seen extreme spreads in 45 LC, 38 Spl in hundreds of feet per second.
There are better magnum only powders.
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If I'm not shooting, I'm reloading.
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