They have training for that, it's called "shoot them in the face if they're wearing armour"
I am aware of the training as I deliver it, primarily on 9mm pistols. And this thinking is sound. Shoot em in the face. Its what I'd do if I was rolling around in a ground fight, but in fact did have the time and ability to raise my firearm up to a mans face without losing possesion.
A 230gr bullet at 850fps has 369 ft-lbs of energy. A 30lb sledge head moving 28fps has 366 ft-lbs of energy. More and more in todays world, performance on armour matters. And I'm not talking about the super armour you can get now with multiple ceramic plates that do indeed stop a round or 2 of .308. Common body armour worn by police these days is 8 to 12, sometimes 14 layers of Kevlar weave. As I have previously stated, I've done lots of shooting at these common armour vest panels. From my experience, the effect that a 9mm causes is not even close to a .40, .45 or 10mm, or even .357SIG. And yes, while this is not a huge concern for the common person, I take note and place it in my own experience database so that I know what happens. Similiar, I know that a .17 HMR will penetrate 5 of these 12 layer panels stacked on top of each other. (Actually, I believe it would do more but I only had 5 that day. And for my line of work, this is actually a far more relevant piece of knowledge.... but lets keep ourselves away from useful information.) So lets go back to the sledgehammer. Who here thinks a strike to the chest with sledgehammer energy levels would do nothing to an attacker? And while a 9 would still mess an attacker up, the other will do it better. My belief is that a 200 grn handload out of a 10mm at close range may kill just from shock to a standard human body. I have seen first hand the damage a sledgehammer will do to a human body... and while the area of effect the damage is spread over is different, the effect of armour is to spread that damage out over a larger area like the hammer, plates notwithstanding. This is just my thoughts and experience. I'm stuck with a 9mm, but given a chance would gladly carry a larger round. In particular because of the areas I've worked, something that is more level at 100 yards, which I practice at, would be my wish. .357 SIG and 10mm are the 2 that stand out if you do this kind of shooting. I pratice at 100 often with my 9.
Point blank with a .44? Thats not standard issue panels if he was still standing. Heck, I've used slugs on standard panels. It stops them... but I can tell you, you wouldn't make it if you were in the panels.... Points moot.
I don't know why I perpetuated this. Poor judgement I suppose.