More Questions???

[QuestionMark?]

My last question before i buy my automag is this

Whats the standard bore size of a automag rt/pro stock barrel?

I am all confused with bore sizes as well, the whole .689 and .686 and all those numbers confuse me so i would like someone to clear it up for me, and tell me if the bore size of the barrel matches the paint size, wat would be the difference in performance to that of a barrel not matching the bore of the paint being used.

[Dayspring]

Paint size > barrel size = barrel breaks.
Paint size < barrel size = inefficient on air.
Paint size ~ barrel size = sexiness & performance.

[QuestionMark?]

Thanks Dayspring appreciate it!