Buckeye,
I know this is an old thread, but thought after reading your post in this thread you might want this information.
Caliber Testing medium Penetration Condition of bullet
.223 Rem. gelatin only 9.5" two pieces
.223 Rem. wall & gelatin 5.5" * fragmented
.40S&W gelatin only 13.5" mushroomed
.40S&W wall & gelatin 22" * no deformation
.40S&W wall & gelatin 22" * no deformation
.40S&W wall & gelatin 19.5" * slight deformation
12 ga. wall & gelatin 27.5" mushroomed
* these measurements do not include penetration of the 6" wall.
CCI Gold Dot.
The link to the whole article:
http://www.olyarms.com/?page=223articlesSavage