From my experience, between Varget and H322 since they are both Hodgdon Extreme powders (not temperature sensitive), H322 seems to be less temperature sensitive for me.
I use H322 for 5.56 (55gr, 64gr and 77gr) and 6.8 (Nosler, SMK and Hornady 110gr) bullets. I just started using the Varget with 77gr 5.56 powder loads and have popped a few primers with near max load and I have not showed any high pressure signs with the H322.
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