I've wanted to test a number of different ammunition types with ballistics gel to see how they performed, but the day that I pay between $150-$250 for Jello is the day I find another hobby. With that in mind, I spent an afternoon experimenting and was finally able to come up with a gel recipe that works.
DIY Ballistic Gel
DIY Ballistic Gelatin - The Armory Life
DIY Ballistic Gel
DIY Guide to Making Your Own Affordable Ballistics GelThe Firearm Blog
Ballistic Gel : 5 Steps (with Pictures) - Instructables
Clear Ballistics 10% FBI Ballistic Gel Test Kit
DIY Ballistic Gel
4 Ways to Make Ballistics Gel - wikiHow
DIY Ballistic Gelatin - The Armory Life