I carry a Glock for self-defense, concealed carry. I own that Glock as well as a S&W M66 .357 Magnum and a Ruger Mark II .22LR. They are listed from least to most accurate...
The .22LR will absolutely kick any .45's bum-bum in any distance competition. I am confident that that Ruger could out-shoot any stock .45 ACP on the market, short of a Thompson Contender in that caliber, perhaps.
Why would I make such claims?
Because I am a real marksman with that Ruger. I can hit tin cans so far away I can barely see them, every time.
Get that Glock or my snubbie .357 Magnum in my hand and I can't shoot past 50 feet with much accuracy.
WHY, might you ask? Because they are designed for different things, folks. The Glock has a big, thick, indestructible set of stock dot-sights.
The .357 has a stock set of iron sights with an orange front post.
The Ruger has (stock) adjustable sights that are impossible to use without a couple seconds of lining up. They don't point well for combat/fast operations. They are clearly and obviously for setting right on top of that tiny little red speck WAYYYYYYYYYYYY over yonder.
When the gun shoots, I watch the red splotch dance. With the Glock, I can usually read the ingredients list before I am able to shoot it, that being HOW MUCH CLOSER that Coke can has to be before the Glock is in its element.
But what would I want in any given life-and-death situation??? The Glock, by far. I don't aim my Glock at distances under 20 feet, I Point-Shoot it. I simply extend my arm and fire, using the natural point of aim I have developed with the thing after thousands of rounds of 9mm ammo.
I can put an entire 19+1-round magazine into the head of a silhouette out to 30 feet... That's combat accuracy. That's more than good enough.
Sure, most of you guys could kick MY bum-bum in a competition, your groups are super-tight and you have spent a lot more money on your guns, but we will all still likely survive the Life-and-Death Situation.
Except for that guy who read this post wrong and started carrying a Ruger Mark II for self-defense... He'll still be sighting the thing long after his wallet, car keys and wife are gone.
But he can likely outshoot any of us stock-gun CCW people at the range, without a doubt...
LOL.
Sorry this post is so long, just lighten up on Glocks a bit, folks. They have a well-established place, and it ain't in competition accuracy.