I really enjoy the 10mm, but I am just a sport shooter. I don’t carry a gun for work or for defense, because I live in Canada and I don’t work in the wilderness, which would be required for a carry permit here.
I would definitely agree that shot to shot times are slower and I find that things like “hammers” are really, really hard for me.
However, if you have big heavy hands (I do, after spending a decade in construction work) it’s more controllable than you might expect.
I find the recoil is hefty but not snappy or unpleasant. I believe I shoot it about as fast as a .40 Glock, although I guess the real test would be to put a .40 barrel in it and see if my times improve.
But I have not noticed a big improvement in my times going to a borrowed G22. I definitely shoot quicker with a G17. But I enjoy the G20 so much that’s what I shoot.
I have to add though that I shoot exclusively my own handloads, which are fairly hot. Considering that I shoot with a lot of IPSC guys, although many of them are also LEOs and often shooting duty guns, I think the slight edge they have on me is less significant than I might initially assume.
Let’s consider the guys who are about at my skill level - an intermediate shooter with a fairly decent training record. They shoot the FAST drill around 1.5 seconds faster than I do…however they’re also using cat sneeze IPSC 9mm loads. Well, I don’t use IPSC 10mm loads, I use pretty hot loads, because my interest is not really in gaming, and I like to use my defensive loads as practise ammo as well, or at least something very similar.
Shooting with +P defensive 9mm, would they be 1.5 seconds faster? No, I don’t think so. I think they would be more like .5 seconds faster.
So there is definitely an advantage to be gained…but I think that once you switch to the +P defensive ammo, some percentage of that advantage is negated. This won’t show up in training environments all that often because most people don’t bring hot defensive ammo to training. But it would definitely show up in any situation where you ARE using hot defensive ammo.
Anyway as I say, I’m a construction worker, not a soldier or a police officer. I shoot for fun and to hone my skills for the extremely unlikely event I’ll be near my legally stored in a safe pistol when someone decides to rob me. So obviously there are much more experienced people here and much more highly trained people here, and the fact that none of them shoot 10mm is not lost on me.
But I do like the mighty 10. At the very least, I never find myself wondering, “but could it punch through the windshield, THEN do that?”
On the other hand, I don’t know how often the average defensive shooting is conducted through a windshield. It’s mainly Dirty Harry factor, I guess. For sure, people don’t necessarily stop moving unless they have no choice, and that seems to boil down to a couple of key situations: 1) not enough blood to keep going; 2) not able to tell the muscles what to do, because the either the decision maker is gone, or the path from the CPU to the engine has been cut off. I don’t encounter gun fights in my line of work, but I do see people get severely injured or killed on the job once in a while, and I’m pretty convinced that the standard take on what causes someone to stop being a threat is correct. And as long as your bullets will make it to the critical components, I don’t think much else matters.
But then again…there is no doubt in my mind that a 9mm is all you need for a regular guy, face front, in normal clothes. But what about a big, tall, fat guy from a funny angle? I don’t know. The questions I can really answer involve driving giant steel pilings into the riverbed off a huge barge, or how a 6 lane highway is going to go here after we finish blasting everything to bits.
I just make the best decisions I can on the basis of the information available to me, and between my semi-rational concerns about penetration under lousy circumstances, my completely rational assessment of shot times, and my 100% irrational love of big boom sticks, I went with the 10mm.
But I am not an expert, just an enthusiastic amateur.