Originally Posted by domino300
It won't burn as well in cold/freezing temp. Magnum primers would help.
Not true! It is temp sensitive, but that is on the heat side, not freezing. It is not as sensitive as H335 or BLC(2). It works very well for a consistant year round powder. I load .223(5.56), 6.5x55, .308, 8x57, and light weight 7mm Rem mag. If it is over 90 degrees and is just hot and really sunny, it will be effected. But not dangerous. I load 4320 well beyond published data, they are serious thumpers and none ever has been an issue even in the summer months. No pressure signs at all. I used it in my AR and now in my CZ527 .223 Varminter.
I have about 10lbs of it now. I bought an 8lb keg last year for 124.00. It is about 189.00 now.