FTR - the 10mm is NOT a 40 SW Magnum. The 40SW was created but cutting the 10mm case nearly in half to reduce the recoil.
Apparently some wussy FBI agents whined about recoil and the firearms instructors didn't want to lose their jobs so they collaborated with SW to created the 40SW so less than firearms ready agents could qualify.
A side effect of the modification was that they took the flat shooting nature of the 10mm and made it less accurate with the shorter case.
And since it's volume of case walls was reduced and people are trying to shoot 180-200 grainers in there, they dramatically increased the case failure rate and the kaboom rate.
The 10mm is the parent of the 40 short and whimpy NOT vice versa.
Anyway, I just bought a Glock 20 and love the darn thing. It's the world's most popular 10mm semi-auto. Built around the 10mm
round. Not a 45 ACP beefed up to 10mm standards.
Accurate, reliable, and plenty of hi caps around.
And the polymer frame does absorb that recoil quite well. All steel guns are nice but when you're shooting some hot
10mm rounds, you'll shoot more with a Glock 20 or a Glock 29. The witnesses are getting some good reviews and lot of folks love the Star MegaStars in 10mm.
BUT the Glocks have tons of accessories for it them. A 40SW conversion barrel that is a straight drop in for $90. Shoot .357 SIG for the same
price. holsters abound. Beef up the recoil springs for nuclear rounds. Get a 6" hunting barrel to go pig and deer
hunting.
No better 10mm semi auto with this versatility. You can load 135 grainers all the way up to 220 grainer but you get another 100-200 fpe and a good 100-200 fpe to. No other Glock produces 41 mag power out of a stock configuration.
And if you hunt, it's the only Glock for you. It's not 357 mag or 44 mag, big in the ballpark. Deer and hogs can be taken.
And next to 9mm, 10mm cases are the most over-engineered cases to shoot from. Very safe with very very thick case ways. Resizing those 10mm cases takes a tad more effort but that is your protection.
Don't get me wrong, I may get a 40SW conversion barrel for my G20 for almost a 100 percent supported chamber. And I will shoot 40SW through it. But I'd buy the 10mm gun and buy a 40SW barrel for it. The advantage would be cheaper and more plentiful brass and less recoil for competing. Maybe a 135 or 155 grain bullet.
But you don't have to shoot snot-stomping Norma rounds to buy a 10mm. It's more accurate than any of the 1911 and Glock 45s I've shot or owned. At 50-75 yards, a 165 bullet drops very little.
BUT you should reload, to cost effectively train in 10mm. You can buy some 10mm plinking ammo from Georgia Arms and I've heard nothing but raves about them. A case costs about $180 and you may have to pay another $20 for shipping. So you can shoot it for the same cost as 45 ACP. you just have to buy from GAs.
I can reload a case of 10mm with qaulity bullets and powder for about $110. Same cost as reloading a case of 45 ACP with FMJ bullets.
Anyway, I like the 10mm round so much, I'm looking into a G29 right now! You can shoot rounds that recoil like a 9mm +P all of the way up to the Norma 200 grain rounds that caused the FBI to wimp out.
No better smack for your money!