I've actually never seen one of the tapered screws myself out of the savages I've dealt with and own. I wonder if it's on the new ones or something? I'm sure one of the gents here will know why it's like that, I'm sure sharpshooter knows.

Call savage up and tell em about the screw up, I'd imagine they'll make it right for you. While on the hook ask em what the heck that fits. Sorry about your parts mixup, crap happens though I guess.