Which is why I used the word "variation". There will always be some degree of shot variation in the same firearm, and of course in different rifles or loads when compared to one another. But I'm talking about the same load in the same SAAMI spec pressure bbl.
Last I knew there has been no definitive reason discovered why the 7mmRM displays such a large shot to shot variation. And when Remington couldn't figure it out they lowered the powder charge in the 70's.
