Andrew Tuohy of VuurwapenBlog.com fame put together a fantastic article about the 5.56 and .223 cartridges. Unlike most of us, though, he actually did pressure testing using differently chambered rifles and a variety of ammunition.
There has long been a debate on whether it is safe to fire 5.56 NATO rounds in a rifle chambered for the SAAMI-spec’d .223 Remington cartridge. Thanks to the folks at LuckyGunner, where the article is published, Andrew was able to use actual pressure monitoring equipment to give a more than theoretical answer.
I highly recommend checking it out.
Surviving the Street: Guide to Concealed Carry of a Firearm
Essential information on concealed carry. This book has just the basics - not a lot of fluff to get bogged down in. Easy to read, Surviving the Street introduces the reader to the important information you need as an armed citizen.
The author presents frank information about self defense in a way that is easy to understand and use.