I figure this link needs to be on GP somewhere...

[Oreo]

http://www.brassfetcher.com/index.html

Gel tests for most popular cartridges.

[freakshow10mm]

That is always a cool site to look at. I never understood the "brassfetcher" link. To me it looks like it should be a website that sells brass.

[BIGGUNGOBOOM]

thats freaking cool

[Oreo]

http://www.firearmstactical.com/briefs.htm

Another good link. Also lots of good info by following the link back to the site index & exploring there.