Here's a recent reply I got from Alliant about the 41 Mag problem with Blue Dot:

Quote
M___,
There is no current tested load data using Blue Dot for the 41 magnum. There is a pressure issue with this cartridge and using Blue Dot.
Thanks,
Shoot Straight
D______
CCI/SPEER/ALLIANT POWDER
2299 Snake River Ave.
Lewiston, ID


That doesn't really spell things out, but it is their current prescription.

I wonder if it's at all like some of the shotgun powders where a fairly large primer flash ignites a powder charge that's always in contact with the flash hole? Perhaps some powders aren't so perfectly suited to the more open conditions of the pistol cases, working many times, but occasionally misbehaving?


Sometimes, the air you 'let in'matters less than the air you 'let out'.