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If you're after magnum loads, I have used Blue Dot with standard primers with no problems.
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I do as well. Be aware that Alliant no longer recommends Blue Dot in 357 magnum with 125gr bullets due to pressure concerns. Heavier bullets are fine (I generally only load 158gr in 357 magnum).

reference:

http://www.alliantpowder.com/getting_st ... tices.aspx

My understanding was that 2400 needed magnum primers, having researched more I see in Alliant's data that is not the case.

I use 2400 without magnum primers without a problem.