I believe he was suggesting the Lott was underpowered for a T-Rex. I think we'd need one of the gun-writing 'experts' to quantify just what the required foot pounds of energy would need to be.

I dare say, o'l Ed Huble has something that would probably work - theroetically of course.

In case you weren't aware, the stuff he's playing with pretty much starts at 55 calibre as the small bore and rapidly gets larger to just over an inch - seems about everything does over 2,000fps.