Can I use my 30.06 caliber Remington 700 in the TAC21 Chassis? Anthony Bujak August 22, 2019 19:34 Follow Yes, you will need a Long Action chassis. You can use long action metal magazines for the 30.06. For a Remington 700 and most of our long action chassis systems you a need 3.715" magazine. Have more questions? Submit a request 0 Comments Please sign in to leave a comment.