Heard a tidbit today about some mil-surplus H4831 that I've been using recently that is from the 1940's. Supposedly, this era of powder has a significantly higher flame temperature than current or modern H4831 powder. Lacking a temperature gauging device for burning gases, I was wondering if any of the old-time reloaders here have ever heard or experienced this and could fill me in? Anyone ever work or know someone who worked for Du-pont or Hodgdon back in the day? This would have been in the '40's, '50's, or '60's. ANy help would be greatly appreciated.