We just call it a bore cut around here. I use it on heavy head leaners. I don't use it as a rule, it's just part of the bag of tricks you need as a logger.
I'd like to first recommend that you find someone to give you some advice first hand, if you can. As for books, the best I can recommend is G.F. Beraneks "The Fundamentals of General Treework", available at
www.atreestory.com.
