Perhaps I'm out of topic, but I am always perturbed by comments that Glock doesn't fit.
No offence, but since you are asking this question, I assume you have limited experience with handguns. My first suggestion to you is to find somebody with the right kind of experience, meaning someone who can shoot most any handgun well, and ask him to show you how to grip a handgun properly.
I shoot revolvers, and semis of the polymer and steel types and have no issues with any of them not fitting my hand. Most if not all handguns are designed and manufactured by companies that know what they are doing, and ergonomics is one thing they work on very very hard to get right. Do you think Glock dropped the ball on their ergonomics?
I am not an expert handgunner, but my first firearms instructor taught the basics of handgunning by starting with the proper grip. Once I understood the concept of a proper grip, I liked the ergonomics of any and all handguns, except perhaps the single action revolver style. My favorite is still the 1911 ergos, but Glocks are fine notwithstanding its grip angle which takes seconds to get used to.
Not a Glock fanboy, but I am sorry I just think some shooters should not miss the chance to shoot Glocks because they think Glocks don't fit their hands well. Learn the proper way to grip a handgun, and you will, for the most part, like them all.
Ever heard the expression "dragging the wood"?
The problem with glocks for a lot of people is the same thing that glock advertises as a key benefit of their design. The low axis of the bore in the hand. If this feature was universally a good thing without some trade off, every manufacturer would be doing it.
The cost of that low axis of the bore is an incorrect alignment of the web of the hand in relation to the trigger. Unless you have suffered a hand injury, an outstretched trigger finger reveals roughly a straight line of bones from the tip of the finger to the wrist, and the thumb can comfortably point out at a 90 degree angle.
When I grip my sig, the top of the beaver tail rests at such a height that my outstretched finger is perfectly straight and inline with the trigger. When I bend my finger into the trigger housing, it is a simple 90 degree bend with the bones in my upper finger still straight and aligned with the bones in my hand straight into my wrist.
Kind of like this.
https://encrypted-tbn0.gstatic.com/...-DfkBJXgpKikDZA9hFLon10c70j7I7gdwz_srhewwIpbM
Note that the top half of his finger is parallel to the axis of the bore. This is critical.
Compare that to the Glock. When I grip a glock, the gun sits so low in my hand that the natural alignment of the trigger finger actually runs along the receiver above the trigger, like this.
https://encrypted-tbn0.gstatic.com/...rt13i4igl_L9E3gCEHSTP5m0DDKjT4CGY_bbjq__3pIqA
That means when I go to reach the trigger on a glock, I have to reach DOWN on an angle, which requires me to torque my finger into the trigger housing.
https://encrypted-tbn0.gstatic.com/...an1BZxCUPvJp-w-bUk6j5HeNYrsalfgsWVafNPJCWpq7A
The boxy square shape of every glock receiver also means that I can not put my finger on the trigger without also contacting the receiver. Squeezing the trigger is impossible without dragging my finger along the receiver. "Dragging the wood". The combined result being my trigger squeeze is neither straight nor smooth.
I demonstrated this issue to one of the senior instructors at Glock, in their booth at shot show. We tried 12 different models. Every available backstrap. He confirmed I had a proper grip. His conclusion: "Weird, never heard of that before". He seemed genuinely baffled. After consulting with some of his peers, he identified this was in fact common, and that it had never bothered anyone before. His solution was to not let it bother me. My solution is to use a gun that lets me squeeze the trigger with a natural straight smooth trigger squeeze without contorting my fingers unnaturally or getting used to discomfort.
Yes, these companies have mountains of experience researching ergonomics and producing the perfect pistol. There is still no such thing as one shape fits all. There are many many different shapes and proportions to hands and fingers. Some people fit glocks no problem. Some people don't fit, but don't seem to mind.
Whether they can articulate it or not, I suspect a number of people who don't think Glocks fit their hand suffer a similar issue.
Interestingly, in writing this post, I went down to my lock up and pulled out every pistol I have, gripped it, and inspected the relationship between angle of finger reaching the trigger in relationship to the axis of the bore. Without exception, the closer my finger was to parallel, the more comfortable it felt.
Interesting that you mentioned those single action revolvers, because my two revolvers were the ones with the most extreme misalignment, and were also the ones that felt the least comfortable.
You mentioned in your post that the grip angle on the glock takes seconds to get used to. I would suggest that this might be true for some people. Some people can get used to the extreme grip angle on revolvers quite easily and are capable of marksmanship that continues to make me blush. Others take more time, possibly a lot of time, or may never get used to that grip angle, and in any event, Glocks aren't so much better (or at all) than other guns as to be worth all that effort trying to overcome something that by design will be difficult to overcome.