The Savage 17 Hornet magazine showed up and it won't work either, but I was able to use the 17's follower in the 22's body and it works fine. At first I figured I would have two three round magazines, but the rifle wouldn't feed from the 17 magazine.

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You can see that the round is sitting higher in the 22 magazine on the left.

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Here you can see that the feed lips contact the body of the round slightly further back, I believe this is what allows the round to sit higher in the magazine.

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Here are the followers, 17 on the left. The 17 will fit in the 22 magazine, but not the other way around. I trimmed the legs on the 22 follower and it still would not work properly. I'm having a hard time figuring out the difference and will work on the 17 magazine some more at a later date to see if I can make it feed properly, I think trimming the feed lips back will do the trick. So, for anybody wanting to do this conversion, a 17 follower in a 22 magazine will fit four rounds and feed properly.