Chad had contacted me a couple weeks ago about the 338 WSM he was screwing together on a Tikka action and what magazines could be used to get an extended OAL to run the heavies. The Tikka OEM Magazine is too short. The The Accuracy International magazines were too narrow and the fat cases were hanging up on the vertical ribs of the magazine.
I did some investigating and found a couple solutions that will allow max OAL out of WSM family of cartridges in a Tikka using AICS magazines — provided that bolt stop is changed to long action.
Solution 1... Use a Accuracy International .338 AICS Magazine (3.715 length). The ribs are shallower on their 338 Magazine than their 300 WM Magazine
Solution 2... Use MDT AICS 300 WM or 338 Magazines (3.715 length). The ribs are shallower on both of these compared to the Accuracy International 300 WM AICS Magazine.
Solution 3... Use Sako/TRG 42 Magazine. The double stack mag accommodates the cases very welll. Essentially creating a long/magnum action CTR
Our AICS Bottom Metal will fit in factory stock and accepts any 3.715” AICS Magazine. Our Tikka TRG Bottom Metal will not fit factory stocks.