First, I have not used AA#7 ( I Like AA#5 though)
But if it's like some other powders (2400 comes to mind), it sometimes takes a fair bit of pressure to eliminate unburned powder. It doesn't help that .45 acp is fairly mild mannered as far as pressure is concerned. Unless it gets crazy it's nothing to worry about. You could warm things up some and it may help.
Why are you using magnum primers? That's your first problem. Neither caliber is a magnum caliber so basically you have the wrong primer.
These days, Magnum LP primers may be all that's available. While they are a bit of overkill, there really isn't much in the way of danger as long as typical cautions are observed, e.g. work up your new load accordingly. I believe that I read somewhere once that Mag Primers are about the equivalent of an additional tenth of a grain of powder (Rule of thumb/Wild Assed Guess kind of thing). Don't know if it's entirely correct, but it sounds somewhat plausible. Whatever the case, it's certainly enough to be accounted for.
MSgt, USAF, Retired
NRA Life Member
Liberals are constantly telling us about the poor and oppressed in this country. With that in mind, why do they feel the need to keep importing poor people from other countries?
Last edited by Overkill0084; 01-20-2013 at 08:40 PM.