My 7mmRemMag reamers are SAAMI dimension reamers, but I load hunting ammo at 3.34" like a 300WM or 30-06.
The SAAMI OAL for 7mmRM is 3.29" and I ignore that.
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. -Ernest Hemingway The man who makes no mistakes does not usually make anything.-- Edward John Phelps