270 brass will have to be trimmed after sizing.......neck is too long....case was from the original 03 brass length and not the 06. The 280, 06 and 25-06 will work fine. 25-06 is not as popular as 270. If you have a lot of 270 brass, by all means use it. Just a little more work is all.
No such thing as a stupid question. What is stupid is not asking it.