Loading shells for quanity shooting on a clay target range for use in warm weather is one thing. Loading them for hunting purposes where the weather might get a little "Nippy" is another. Personally for hunting use I seldom go below 7500 psi. I would run as fast as I could from any load with any brand of powder as slow burning as 7625 in a sub 5000 psi load if it got below about 70°F.

Miller/TN
I Didn't Say Everything I Said, Yogi Berra