By the way, the .30'06 Garand's round and the 7.62mm Mauser round are both equally deadly. Heck, when a bullet is travelling at 2800 feet per second, the thing it hits will be damaged quite severely. And yes, the '06 is a larger round - but not by much.
If you're qualified, you can buy your own M1 Garand for $500.00 from the CMP. Check it out if you're interested:
http://www.odcmp.com