
God people are full of boll**ks about firearms
Lets see, how many "misconceptions"......
Hollow points, Jacketed Hollow Points, Expanding Full Metal Jacket and all the rest have squat to do with minimising bystander caualities.
The sole intention is to dump as much of the rounds kinetic energy into the target as possible. A wholly secondary effect will be to reduce over penetration and to possibly cut down on mowing down kindergarden children.
Almost all of these rounds FAIL to act in this way. The wounding effect is dependant upon
1. The round either expanding or fragmenting (or both) in the body
2. Velocity and energy transfer to the body via hydrostatic effects, leading to both temporary and permanent crush and cavitation injuries along the wound channel
Trouble is when a jacketed hollow point hits the body it needs a fluid (read flesh) to fill the round cavity causing expansion/fragmentation.
Alas most folks wear clothes and on a regular basis the cavity will fill with material/cloth/leather/denim, fail to expand and will continue on its merry way with substantially reduced effects.
"if you're hit with a dum-dum/Glaser you're not just disabled, you're dead"
Again wishful thinking I'm afraid, the only way to ensure an immediate kill is by what is euphamistically know as Central Nervous System Collapse. Basically you have accurately hit a small section of the brain where it is joined to the spinal cord. Otherwise you get twitching, tremors, some motor mobility and other such stuff before you shuffle off this mortal coil.
Pistol round hit on the body will not lead to instantaneous death.
Frangible rounds are typically made up of sintered metal powder. Basically take fine metal dust, and compress under heat and pressure. They will upon impact with a SOLID surface return to the dust from which they were made. They don't have any magical killing capacity, they are used mostly in firing ranges where you want to cut down on lead exposure.
The Glaser round is not a frangible round it effectively a physically unstable pre fragmented round and has better surface wounding capabilities.
As for the bloody .223 round, it has very low penetrative capacity against solid surface and continues (in the ever popular War on Terror) to fail to deliver what the grunt on the ground requires.
One particular fun one is that unless the round velocity stays above ~2500 feet per second on impact, it will not tumble and will zip on through the bad guy. Alas lots of the US soldiers want the handy dandy short M4 carbine which due to barrel length drops muzzle velocity below the magical figure at about 100 odd mtrs. The failings of the .223 are why many of the lads grab an AK where they can get away with it and why, yet again the military are still looking at a better round in either the 6.5 or 6.8SPC
If you would like to have a look at some of the actual results of various type of round go to
http://www.theboxotruth.com/docs/theboxotruth.htm
Bizarre but illuminating ...............