Sometimes the search feature seems to get a brain fart and can't find anything. I don't know if Len figured this out or not. There is a minimum, I believe 3, characters you need to use.
You can also use this type of "Google Search" to find 300 Remington Ultra Mag. In your Google search window at the top of your browser type in: 300 remington ultra mag site:longrangehunting.com and it will find it on "Longrangehunting.com", not the whole web.
This seems to work for just about anything and all you need to do is put the site URL after the "site:" and away you go.