Polymer Magazine: 300Win Mag-sized Cartridges, 3-round, AICS, CIP Length, MDT

FIRST, check the cartridge.  This is the correct magazine for the following cartridges: 

• .300 Win Mag
• 7 Rem Mag
• .264 Win Mag
• .270 Weatherby Magnum
• .257 Weatherby Magnum
  

This is NOT the correct magazine for 7 PRC, .300PRC, .300WSM, 6.5 PRC, etc.  

SECOND, check the magazine length.  This magazine is a long-action CIP length (3.85"), which means this is the correct magazine for use in the Backlight Chassis for all brands of actions/rifles EXCEPT Tikka.

THIRD, check the material.  For these cartridges, we only carry a metal magazine because it makes feeding work better.  It costs a little more, but you can bend the feed lips on these magazines to dial in your feeding, which can be required for these long magnum cartridges that can be a little finicky.  You're good to go.