[J. L. Lyon]

I recently purchased a snail shell magazine and a reproduction loading tool. I can get 27 rounds in it, but can force no more in. Is this a common problem with these magazines?

I've then unloaded the magazine by hand and the follower spring does not always move the follower forward. Is this a common problem?

Is there anything I can do to correct this? I'm worried about trying to take the magazine apart given the powerful spring inside.