Horrible idea, gel isn't a human body, giant tissue displacement in the first few inches of a gel block means very little to stopping a threat. Will it work to stop someone, probably, but is it the best choice, absolutely not.Thoughts on this concept?
The Civil Defense 9mm is the best self defense 9mm cartridge on the market. It has more kinetic energy than a lot of 45 ACP self defense rounds, except it's lighter and easier to shoot than any other 9mm defense round. It's the best of both worlds, the power of 45 ACP, with more conveniencelibertyammo.com
The reality is pistols suck at stopping people. 95% of all "stops" are psychological, meaning the bad guy thought "ouch" and stopped the attack. A 22lr will accomplish that most of the time. The other portion of stops you have to actually physiologically stop the subject and pistols don't do that well, there are only two ways to do that in reality. You let enough blood out and air in that their blood pressure reaches a point they can't function or you hit something in the central nervous system and turn off important switches.
Rifles and shotguns do a much better job of this due to the sheer amount if kinetic energy the are capable of. Rifles travel at a high enough velocity that the wound cavity damages tissue, pistols don't do that, sure the tissue will stretch but not enough to damage that issue and create that hydrostatic pressure wave that effects areas the bullets don't actually hit.
With a pistol your best bet is to find a good bonded round that will reliably reach a depth where it can effect important things that don't respond well to bullets. I don't care if it's 9mm, 40, or 45 they all suck at ending threats, we only use them because they are easy to carry and they are all near the top end of what most people can effectively shoot from a pistol.
The three rounds I suggest for pistol rounds are
1. Hornady Critical Duty
2. Speer Gold dot
3. Federal HST
I carry the Hornday in 9mm+p.