Again, I was thinking of a FMJ that penetrates enough to be effective, but doesn't over penetrate (as claimed on youtube) and become a danger to innocent by-standers. "Sources I read" claim that FMJ's are typically more reliable than HP's when it comes to feeding
OK, I understand your reasoning. Now, consider this,
There is no way to make a bullet that only goes "Far enough and no farther".
It is simply NOT POSSIBLE. You can make a load that is just perfect in situation A, but in B through Z it will either go too far, or worse, not go far enough!
Anyone who tell you other wise is either selling something (that won't work as claimed) or just outright lying, for the fun of it.
As far as FMJ being more reliable feeding than JHP, this is true in MACRO. When you look at all the different guns and all the different kinds of ammo, you will find fewer feeding failures with FMJ. OVERALL.
Any specific individual gun can feed either, or both equally flawlessly or flawed. The only way to be sure is to test SPECIFIC ammo in a SPECIFIC gun.
In a way its like saying, Looking at the over all fleet, Fords get better gas mileage than Chevys. (illustration only)
AVERAGES are just averages, and don't guarantee that the gun and ammo in your hands will be average, or something else.