I live in Washington and it is pretty stable here, but that is not much of a test. I hunt every year in Colorado, down into the low single digits and it gets it done. I originally built my load on N570, which is a unicorn any longer, it worked great and had awesome velocity but it wasnt worth the worry when I couldnt get powder, several books have 7828 listed as the ideal for 30 Nos so I felt good about it.