You'll get a skosh more velocity with the AB, though it is doubtful you can measure the difference.
Cartridge : .30-06 Spring. (SAAMI)
Bullet : .308, 165, Nosler Accubond 55602
Useable Case Capaci: 59.818 grain H2O = 3.884 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm...
What a delightful journey! Reminds me of earlier years when I set out to fish the rivers of BC & AB. My fishing partners and I stopped in every stream we crossed to see what lurked in the crystalline waters that sparkled around the rocks. Such trips are the stuff of legends, or at least...