Ok now being gut shot with a 45ACP, and make it to the hospital and live to tell about it???? First off I would not wish for any man to be shot with a 45ACP or any other firearm for that matter over a $10 bet thats for darn sure. Zrex does this mean that a 22cal is capable of more distruction than a 45ACP because it's a faster round??? I see your point regaurding that Muzzle Velocity and Muzzle Energy are important factors, however to say that bullet wieght, expansion and retention after striking it's target does not mean anything is going to be a hard one to sell. Like I said previously Balistic Charts are a great tool to use however it can't speak for everything and can also misslead a person to think a certain rounds can take down any beast in the world @1000 yards. As far as the 30/30 being a good brush gun? It's a great brush gun do to it's compact size and in the thicket you can move around without getting it hung up as easy as other long guns, not to mention for a quick snap shot, that often happens in thick woods the 30/30s design is a natrual handler in tight spaces that allows you to bring up on target. I would never suggest to anyone to shoot through thick brush with any round for that matter because it's just not responsible to take chances.