Quote Originally Posted by sharpshooter
Quote Originally Posted by nhm16
They are not caliber specific. However, certain cartridges don't lend themselves to magazine feeding, due to factors such as the amount of case taper, and therefore magazines may have to be modified to work.

Check out this article on how a guy in Belgium had to modify his AI magazines to reliably feed the 6BR:
http://www.6mmbr.com/gunweek032.html
They are INDEED caliber specific. The .308 will feed .243,7-08,.308. The 22-250 is a different type. The .223 will feed .223 and .204. The 6BR is a modified version of the .223. The WSM's are different also. Long actions have 2 versions ,standard and magnum.

Are the followers the same on the .243/7MM-08/308, the .22-250, and the WSM's? It would be logical to say that the follower would be different with the .223, but how about the others? How many different follower types are there for the new centerfeed short action calibers?