The kind of wear you speak of, in that short amount of usage, seems to indicate as I mentioned in the previous post, that a finished part missed the heat treatment, it happens.
Nothing is foolproof, clean it up and file test it, the file should indicate it is soft.
if so, I suggest you clean things up and replace the soft worm/cam follower.
Post a close up picture of the follower on here, as that don't happen very often.
