I read through this thread just now, and it dawned on me--The only bullet weights I have ever used in 40 S&W are 175-180 grains, and in 10mm only 175-180 and 200 grains.
It appears that the 10mm Auto cartridge might be experiencing a rebirth of interest. SIG-Sauer has announced a variant in its P-320 design for the 10mm. I've loved the caliber for a long time, and have had at least one example in the safe for 30+ years.
The cartridge has an interesting history. The first noises about it occurred in roughly 1975, in Guns & Ammo magazine. Their writers' concoction used cut-off 224 Weatherby brass (IIRC--it was a belted case that was proprietary to Weatherby, maybe the 240? Not sure.) and used cast and jacketed bullets meant for the 38/40 WCF. Velocities imparted were in the 1100-1150 FPS neighborhood, and even a hard-boiled 45 ACP man like LTC Jeff Cooper said that the "40 G&A Magnum" had merit as a goblin stopper.
The idea didn't die out. In the early 1980's Dornaus & Dixon brought out their Bren Ten, a design based upon the CZ-75 system. It was a decent pistol, but for a variety of reasons the pistols were scarce, expensive, and magazines were (and are) VERY scarce. The cartridge itself was simpler than the G&A precursor, using a bit more common existing case (30 and 32 Remington, cut off) as its parent and either the 38/40 jacketed bullets or newer designs--like the Winchester Silvertip 175 grain JHP.
In the mid-1980s S&W went "all-in" with the 10mm, chambering their large-frame Third Generation 45 ACP series pistols (45XX models) in 10mm--the 10XX series. There were traditional double-action variants, DAO variants, decocking-lever variants, and at least 2 barrel length options (4-1/4" and 5"). FBI adopted the 10mm as an issue caliber, and that shop's 1986 Miami shootout experience figured highly in that move, I'm sure. I believe (2nd-hand info, from reliable folks) that FBI's Hostage Rescue Team have or had H&K MP-5 variants in 10mm among their toys and tools kit.
Life was good, right? Kind of, but the 10mm kicks more than the other 3 popular autopistol calibers. There are no plea bargains on the laws of physics. The FBI hires a wide range of people as agents, and the usual run of accountants and law school grads that get hired aren't often active in the arms sports. That recoil impulse from the Norma-level loads (200 grains @ 1200 FPS) or even the Silvertips (175 grains at 1225-1250 FPS) weren't manageable by a lot of recruits. Federal Cartridge Company cobbled up what has been called "The FBI Lite" loading, the usual 180 grain bullet run at 1030 FPS, that was a lot more manageable for the agents.
It didn't take long for another innovation to take hold--the 40 S&W. The shortened 10mm case was given a small pistol primer, enabling its adaptation to existing 9mm-sized plaforms. It is almost the equal of the 10mm Lite. It was an instant success, though some trainers insist that its recoil level remains daunting for some shooters. The 40 S&W's success likely slowed the demand for 10mm pistols markedly, because as felon repellent the 40 S&W does about as well as the 45 ACP in terms of stopping armed encounters.
As good as the 40 S&W is, the 10mm remains significantly more gun and more caliber than the 40 S&W. It is not a "Magazine-fed 41 Magnum" as its fanbois love to tout, but if you are a Hatcher Scale acolyte like I am then you rate it above the 357 Magnum by virtue of its diameter. 16 rounds of such persuasion in my Glock 20SF is quite comforting. Some of the loads used in stronger 10mm pistols run right on the heels of the 41 Magnum, but that is country I don't explore. 44 Magnums and a Ruger 45 Colt have that ZIP Code well-covered for me.