I had one. It'd feed hardball and that's about it, probably where they got the name, eh? It was a pretty gun, shot okay, about 2.5" groups off bags at 25 yards with most ammo which ain't too bad for a 1911. I never experienced the galling problems with the stainless that some have reported, but then, I'm anal about lubing autoloaders. I kept it well lubed.
It got stolen and I took the money from the homeowners and NRA insurance I filed on it and bought a new Ruger P90 and never looked back. I'm quite happy with the P90, flawless with anything I feed it, 1-1.5" accuracy at 25 yards, and I prefer the DA/decocker manual of arms. I've had two 1911s, won't buy another after that Hardballer and the Auto Ordinance I had. I ain't got the big bucks to buy a nice one. The Ruger works MUCH better for me.
When I bought that AMT, I had to have an extractor fitted in it. It wasn't done right at the factory and would NOT cycle out of the box. Once that was fixed, though, it ran okay on ball. I also had a 200 grain cast SWC Lee bullet I cast that ran in it, but I had to seat it out to the point that it was head spacing on the rifling in the barrel to get it to work. The thing was OAL sensitive, wouldn't feed short OALs which most hollowpoints have. My Ruger ate the flying ashtrays all day long. That H'Baller would choke on the first one out of the magazine.
Stick to ball ammo, it's okay. I won a few pin shoots with it out at our local range. I was sorta into shooting pins at the time, the main reason I bought the thing. It certainly wasn't for carry. I'd never have carried it, but we couldn't legally carry back then anyway and I carried mouse guns, when I did carry, to avoid any chance of detection. I never carried IWB until I got a license in 96. I still prefer light, pocket sized subcompacts to that 40 plus ounce monstrosity, though. The P90 is nearly 10 ounces lighter on the belt than that thing was thanks to an alloy frame.