Oh I do have the book, two in fact, but I tend to use the electronic (& I don't mean the web site) one as it has an anagram sorter, etc. I did in fact find both of the query words there - I missed the definition of bolt when I was reading through.
The only downside of Chambers is the lack of proper names - I used to like the old Collins which did have a plethora of them. Did you know that if you have a library card and your library participates, you can get access to the full OED?