The CPRC also did similar tests against pig ribs and issued rain gear with lead shot in #7 1/2, #4, and 0Buck sizes:
http://www.docstoc.com/docs/111799859/TR-03-98-Lead-Shot-Penetration-in-10_-Ordnance-Gelatin
http://www.docstoc.com/docs/111799859/TR-03-98-Lead-Shot-Penetration-in-10_-Ordnance-Gelatin