Case capacity differerence between 30-06 AI & 30-280 AI?

[alnukem]

I bought a old Savage 110 30-06 to experiment with, unfortunately, it only has a 22" barrel. I am guessing that the capacity difference is next to nothing. Thank you.

 

[FEENIX]

I bought a old Savage 110 30-06 to experiment with, unfortunately, it only has a 22" barrel. I am guessing that the capacity difference is next to nothing. Thank you.

Depending on the source, the cartridge parent cases are nearly identical at 68g H20. When AId, the .280 will give you a slight advantage.