[work in progress] I’ll outline WHY I’m making the choices I am and different options for ammo.  Click this post to get the details.

Home Defense: Person to Person

Frangible http://www.ammunitiontogo.com/catalog1/product_info.php/pName/20rds-556-winchester-55gr-frangible-ammo/cName/223-556-frangible-ammo

or

http://sportsmansguide.com/net/cb/cb.aspx?a=558372

Military Grade M885:

Military M885 Steel Core Green Tip http://sportsmansguide.com/net/cb/cb.aspx?a=140094

http://www.palmettostatearmory.com/725.php

http://www.palmettostatearmory.com/942.php

Plinking at the Range:

http://sportsmansguide.com/net/cb/1000-rds-223-556×45-mm-wolf-fmj-55-gr-ammo.aspx?a=310940

http://sportsmansguide.com/net/cb/wolf-223-55-gr-fmjbt-1000-rds.aspx?a=606395

http://www.palmettostatearmory.com/502.php

http://www.palmettostatearmory.com/310.php
1000rd 

There’s nothing wrong with steel cased ammo.  Article: http://cheaperthandirt.com/blog/?p=2858