I noticed the 26" barrel on the 280AI after I posted.
Do you think 75fps is an accurate decrease though for matching the barrel length?

According to this formula a 30-06 case loses 39 fps when shortened from 26" to 24". Wouldn't a .280AI be affected closer to that number?

http://www.loadammo.com/Topics/October05.htm

I listed two different powders because they were listed as the top velocity charge for each cartridge. I wasn't sure comparing same powders would be fair since they are different cases. However I agree that comparing the charge weight on two different powders is misleading, I was really just using a little hyperbole there to have a little fun.

If the formula I referenced is correct, it's still not that much difference between the 7RM and the 280AI when one is discussing long range. At least to my thinking. Sure the 7 RM will top out a little higher, but is that small amount enough to pass on a shot at any distance comparing one to the other?

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