Greetings Rated M for Magnum,
I have used Dupont IMR4064 for decades in the .308 and it should be fine in the 7mm-08. I found a definite improvement in accuracy with increases in loads. The .308 case tended to run out of capacity with the coarser powder but I doubt this will be a problem with the 7mm-08 and smaller charges.
Regards Grandpamac.
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