Beavertails, as I recall, were introduced for the benefit of trapshooters, who wanted to protect their fingers from the extremely hot barrel temperatures which trapshooting, particularly doubles, creates.

If you feel that you have to have greater protection and don't want to destroy the lines of your double gun, may I suggest this, which I have found most helpful: http://www.jeffsoutfitters.com/_HAND1005...p;categoryid=73