Quote:

... quite a few SBC's in OZ. Late 60's early 70's Holden Monaro's could be had new with SB Chevy power.
Hotrodders here use SB Chevy's a lot also.
I once had a 350 small block with a turbo-400 trans in a Landcruiser trayback.
It was awesome in soft sand beach driving!

Please take no offense, mate, but one thing I love about you Aussies is that whether it's about your firearms or your vehicles, you definitely think rowdy like us Yanks!

Now, back on topic. Has anyone here ever seen/used the Thornily Stopping Power formula?

TSP = 2.866*velocity[fps]*(bullet weight[grains]/7000)*SquareRoot(bullet diameter[in])

Not sure where the numerical constants come from, but it seems to be a reasonable yardstick, incorporating momentum as well as bullet diameter, and without emphasizing the latter so much as Mr. Taylor's formula.

You can play with it here:

http://www.beartoothbullets.com/rescources/calculators/php/thornily.htm