Great ammo search tool!

This is great for finding who has the lowest prices on ammo! The first listing for .30-06 has an error in the round count for the box, and correspondingly the price is wrong, but other than that, I've not seen another error.

http://www.ammoengine.com/

It's missing a lot of calibers. Here's another to try: http://ammoseek.com/

However is you try some of the odd ball calibers you do get odd ball results.