Reading this thread and I come away with the feeling the 9mm is highly variable. My own experience is.
I'm really a revolver guy, but a couple of years ago it occurred to me that this whole semi-auto thing might catch on. Given it's popularity it seemed the 9mm was a solid choice. Lots of brass around and cheap factory ammo. Academy had a Black Friday special on a Taurus so I bought it.
Eh. Functioned flawlessly but not what I call match grade accuracy. I tried a bunch of powders, bullet weights, bullet diameters and it was O.K. for what it was. But it couldn't seem to do much better than a paper plate at 10 yards off-hand for me. After a few thousand rounds I decided I needed a better gun. Maybe something full-sized.
The next Black Friday gun was a Taurus 92. Another flawless functioning gun, but I just did not care for it much. Grip was kinda chunky. Shot a bit better than the first Taurus, but still couldn't hold a candle to my revolvers. Ran all the variations through it I ran thorough the first one, and then some.
O.K. let's quit fooling around. Maybe it's these economy guns. Bought a Springfield Stainless Loaded Target 1911. Shoots better than the Tauri but after 3,000 rounds I'm still not where I want to be. It holds it's own but I get these wild flyers that screw everything up. Even when I'm very careful and go back to basics with the single stage and hand-craft them in sorted brass.
O.K. maybe it's just me. So I run into a Kimber Gold Match II in .45. Let's see if it's me...nope, Kimber shoots like my revolvers.
So I have had zero functioning problems with bullets from 115gr to 147gr. I even shot some 150 SWC intended for revolvers through the Springfield to use them up. Fed flawlessly. Shot pretty much as well as anything. Which is not great.
So in my experience the 9mm with lead bullets is difficult (I haven't given up on it yet) to find an accurate load for. Of course that depends on your definition of accuracy. Maybe it's not fair expecting the Springfield to be as accurate as my Model 66...or 14...or 657. It seems close with jacketed bullets but I'm having quite a bit of trouble getting lead to shoot.
I have to ask myself, is it worth it?