Thread: 4895 vs 2206h

Originally Posted by Rn-85

Yes I'll use the imr data when loading imr.

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It would be best to think of IMR4895 and H4895 (AR2206H) as different powders as you propose. True they are similar in burning speed but each can be slower or faster than the other depending on what is being loaded. IMR4895 was developed in the 1930's for the .30-06 Garand rifle and is more temp sensitive than AR2206H so two different powders. IMR loads have increased substantially over the last 50 years for whatever reason, possibly the different pressure measuring system.
Regards Grandpamac.