Nope, and the info was from GM 2007, not I, as you seem to feel. So write them on their omissions.
Funny - you have no idea on barrel length and such that could influence your numbers above.
The info was for the folks pondering which route to go, a comparison of sorts. I could care less what persons ultimately do, but try to give food for thought when they ask for opinions.
Man, I wasn't bagging on you, when I said somebody - I meant whoever wrote the article.
Sorry, if came across offensive.