Glock 20 10mm Question

Why not get a .40S&W pistol and run hot ammo? Both gun and ammo would be cheaper; and, unless you're dealing with large animals, you probably won't need full-power 10mm anyway.

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Nowadays I'd almost suggest going for the glock 40 over the 20. I currently have a gen2 g20.
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Why not get a .40S&W pistol and run hot ammo? Both gun and ammo would be cheaper; and, unless you're dealing with large animals, you probably won't need full-power 10mm anyway.
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This is actually good advice right here.

I would buy the 40 today over the Glock 20. 10mm is over-hyped big time. The 40 is a great round that is available in way more guns and the ammo is far more available too.

.02
 
I would buy the 40 today over the Glock 20. 10mm is over-hyped big time. The 40 is a great round that is available in way more guns and the ammo is far more available too.
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Umm, the Glock MODEL 40 is chambered in 10mm. It is similar to the Glock 20 except with a 6" barrel. Which gives you a fair deal more when shooting "real" 10mm.

From the longest barrel the reviewer used (4.5") to chrono it, the S&B 180gn 10mm load averaged 1056fps/446fpe, ... so yeah (LOL! ), if you want to shoot "40-level" 10mm ammo out of your G20, that's definitely your factory load.
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If the OP is not going to reload it makes sense to me if he's looking for cheap practice ammo. You're shooting fairly inexpensive ammo to practice, but ammo that is made for the firearm and has proper headspace. I too prefer more full-power loads, but I also reload and it may cost me half a penny more a round to load to 10mm energy vs .40s&w energy, if even that. The OP doesn't reload and this makes perfect sense for his purposes of wanting less expensive practice ammo.
 
If the OP is not going to reload it makes sense to me if he's looking for cheap practice ammo. You're shooting fairly inexpensive ammo to practice, but ammo that is made for the firearm and has proper headspace. I too prefer more full-power loads, but I also reload and it may cost me half a penny more a round to load to 10mm energy vs .40s&w energy, if even that. The OP doesn't reload and this makes perfect sense for his purposes of wanting less expensive practice ammo.
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Well, Sig's 180gn 10mm FMJ ammo @ 1250fps isn't that pricey (per 50-rd box), and it allows the non-reloader to get trigger-time with something in the upper mid-range of the 10mm's energy curve.
 
Umm, the Glock MODEL 40 is chambered in 10mm. It is similar to the Glock 20 except with a 6" barrel. Which gives you a fair deal more when shooting "real" 10mm.
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LOL, Yup, that new G40 is really going to mess up the folks that have been talking about their "Glock Fody".
My son bought a G40 MOS and added a Vortex optic for his " alternative methods" deer season gun. That thing is awesome. Thinking about adding one to the "accumulation".:D
 
I see. So there really isn't any big difference in a hot .40 over 10mm? I might have to give those .40 police trade ins a look.
 
So there really isn't any big difference in a hot .40 over 10mm?
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:confused:
All 40S&W is loaded pretty hot. If one of those boutique ammo companies is claiming +P, or "hot" 40 S&W they are blowing smoke, or potentially blowing up your gun!
 
Model12Win said:
I see. So there really isn't any big difference in a hot .40 over 10mm? I might have to give those .40 police trade ins a look.
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Only if you are looking at the mild side of 10mms.

Take a gander at the Underwood options for each caliber using the same bullet weight and you’ll see a trend of the 10mm is always higher.
 
I see. So there really isn't any big difference in a hot .40 over 10mm? I might have to give those .40 police trade ins a look.
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You will not get close to even mid 10mm levels safely with the .40s&w

Sig's 180gn 10mm FMJ ammo @ 1250fps isn't that pricey (per 50-rd box)
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I haven't priced ammo lately but it's good to know for 10mm shooters. I'd say that's a pretty warm load too. It is about the top end of what I would do reloading.
 
Umm, the Glock MODEL 40 is chambered in 10mm. It is similar to the Glock 20 except with a 6" barrel. Which gives you a fair deal more when shooting "real" 10mm.
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Yeah, I meant the Glock 35 in 40 caliber. So many numbers....
 
Carried 10mm and practiced with 10mm when I was shooting on my preferred range where I had no problem corralling my brass. Anyone who has ever loved and handloaded 10mm since before the the turn of the century knows the fantastic pain and suffering of losing 10 brass.
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hahahaha! BTDT. Love my G20, over 25yrs. Use the heavier recoil spring for full power handloads so I don't have to chase that brass into the next county.
 
.40 barrels

I can't say that I would endorse shooting .40 S&W in the 10mm barrel. As noted, the headspace issue with the shorter case is just not "right". Why stress a gun part? And why disregard the many warnings over the years about using ammunition only intended for the particular firearm?

I'd go with the .40 Lone Wolf barrel. Keep in mind that the LW will allow one to shoot lead bullets, which are cheaper than a jackedted slug. I'd speculate that one could get ahead of the initial cost of the barrel in less than 1000 rounds. Plus, brass is way more plentiful, to the point I'd state that .40 brass (and 9mm) is just about free if one spends just a little time picking the stuff up at local ranges. I have NEVER bought any .40 or 9mm brass and have gobs of the stuff.

You hear the 10mm bashers always refering to weak 10mm ammo and the .40 is near equal in a lot of loads. There is truth to that, some 10mm is soft, but there is another side of that arguement. Some .40 ammo is darn soft too. I've chronographed boxes of .40/180 FMJ that did not break 900 fps from my Browning HP.

Regards the ".40 in a 10mm" is the same as ".38 in a .357" comment. No it is not. The two case types, rimmed and rimmed less, headspace completely different. The revolver case headspaces on the rim, limiting how deep into the cylinder chamber the case can travel. The auto pistol headspaces on that tiny case mouth. The shorter .40 case (in a 10mm chamber) is limited only by the extractor hook. Not only can one stress the hook , but stacking tolerances might lead to failures to fire as well.
 
Why not get a .40S&W pistol and run hot ammo? Both gun and ammo would be cheaper; and, unless you're dealing with large animals, you probably won't need full-power 10mm anyway.
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Because the Glock 20 is a better gun than any of the .40 Glocks.
I had a G-20 and a G-35, both gen 3, and the 20 was more accurate with the stock 10mm barrel or the KKM .40 barrel.
Factory .40 ammo worked perfectly in the converted G-20, it would even lock the slide back with a 20 pound recoil spring.
For the handloader the conversion was bliss. .40 brass was everywhere and it also gave me the option of using small primers in .40 brass or large ones in 10mm brass. Plated bullets were also more accurate in the KKM .40 barrel than they were in either stock barrels.
 
The only conversion that I personally know of that works if converting a Glock 22 to a Glock 17 with a barrel and mag change because they use the same frame.I do have option for my Glock. I have Lone Wolf match barrels in both calibers with mags for each caliber.
Back to original post, the 10 mm frames are larger for the more powerful round.
If you bought a Glock in 10mm, I’m not sure if I would change it for a .40 S&W conversion. I see where guys have done that, but shooting.40 through a 10mm chamber sounds risky to me. The cost of the Lone Wolf barrel and mags sounds expensive.
Ammo for a 10mm is not a whole lot more plus the money you save on converting will buy a lot of 100 mm ammo.
 
The only conversion that I personally know of that works if converting a Glock 22 to a Glock 17 with a barrel and mag change because they use the same frame.I do have option for my Glock. I have Lone Wolf match barrels in both calibers with mags for each caliber.
Back to original post, the 10 mm frames are larger for the more powerful round.
If you bought a Glock in 10mm, I’m not sure if I would change it for a .40 S&W conversion. I see where guys have done that, but shooting.40 through a 10mm chamber sounds risky to me. The cost of the Lone Wolf barrel and mags sounds expensive.
Ammo for a 10mm is not a whole lot more plus the money you save on converting will buy a lot of 100 mm am
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You can use the same magazines. You only need a 40 barrel and it's on.
 
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