Quote Originally Posted by darkker View Post
Read FAQ #5
http://www.ramshot.com/faq/

Some of Denton's work can still be read here:
https://www.shootingsoftware.com/tech.htm


It's about application. The Naval Warefare Testing Center tests for temp swings much larger than what Hodgdon says they test at. They also show pressure traces for all of the tests, and actually list number of shots, etc to make it a valid comparison. Most don't think that "temp stable" powders begin to slow down with increased temps(to a point), but they do, and one of the ways you can tell how stable they are in an application.

Again, this is about application. It doesn't mean that Varget won't get you fine accuracy in a 223, it in fact can. But the notion of "it's stable and therefore magic everywhere" is Hooey. Unless you love to cook your ammo in a hot chamber, the whole thing is overblown for most of the fine folks out there in TV land.
Of course it's not magic everywhere, and for those that don't extend their range, it is probably not an issue unless they're running on the ragged edge at winter time temperatures.

As you know, for long range you want those velocities to be as tight as possible.

Additionally, I'd venture to guess if your not smack dab right in the middle of an accuracy node, a slight variance in pressure and velocity will cause accuracy and poi to shift considerably.