Re: CCI BR2 in magnum cases?
I have used many of them in 25-06 and never had any problems. I stopped using them when they went to over $4 per 100, they can keep em for that price!!!
I did however do a little experimenting when I had my 300 RUM. I had no mag primers and decided to go ahead and load some of the CCI BR-2's up for the RUM and 200g AB's. I worked up the loads in the winter with a temp of about 30-35 degrees. I was getting 3100fps and great accuracy with 92g of H-1000. Primer seemed to be igniting the powder just fine, no hang fires that I could tell.
So, I load up the remaining cases and go up elk hunting. Temps were a bit colder, anywhere from -10 to 15 degrees. After shooting a few of them in the colder temps, I could tell they were slightly hang firing. I'd squeeze the trigger, hear the firing pin hit, then about 1/2 second later the shell would go off, like a delayed reaction. They still went bang, but I figured the colder temps were the case.
I wouldn't imagine why they wouldn't work with a 300 Win mag when your burning 20g less powder unless your in sub zero temps.