It's one of the most powerful, stock, hi-cap handguns available without going 44 magnum or exotic.

I bought one (two, really as I quickly upgraded my gen 3 to a gen 4) because I wanted something appropriate for hiking or camping. I bought and sold a Smith 629 44 magnum because I didn't like it. This isn't as powerful but it's far better than many and with the right rounds, and 16 of them, it's a pretty potent package.

 

Not sure. Most data w/o going nuclear give about a 150-200 fps increase over 40.
My G20 at safe pressures was about that. A G35 with 40 would be scratching at it close.

Tried some boutique loads they were starting the seperate at the web of the case...I don't like to live that dangerous.

There seems to be imho a bit of hype surrounding the 10....my chrono numbers never lived up to the proclaimed numbers some say they get from the factory G20.

Just one person's view I doubt anything hit with a 10 or 40 could tell the difference. YMMV.

 

I became interested in its greater power compared to other pistol cartridges. The 10MM can push a heavy bullet fast. It's like the love child of a .357 Mag and a .45 ACP. And it can be shot from a pistol that is a reasonable size to carry concealed.

 

I am a 40 guy, it is only fitting to have a deluxe 40 the 10mm. The loads I make hurt to shoot out of my G29SF, they are comfortable to shoot out of my 20Sf.

 

Even if you want to keep shooting .40 caliber, a converted G20 is a nicer gun to shoot it from because it's heavier & not as flippy when firing forty.

 

Razorbacker,

You are kidding, right?

 

I love the 10mm. I'm lucky enough to work for a dept that allows 10mm for duty.

The 10mm loaded as intended can push a 135 grain at 1600 fps with around 780 fpe. 180 grain 1300 fps and 687 fpe. I like it better than the 40. I like that extra velocity and extra 200-300 fpe.

I'm looking forward to the new Glock 40 10mm long slide.

 

So is a G35 with good ammo getting kinda close to a G39?

 

I have both a g20 and g29. I really like the versatility of the 10mm round you can load it hot enough to take pretty much any North American game or down to 40 s&w range for plinking and practice. I carry the g29 almost everyday it's pictured in my avitar.

 

So is a G35 with good ammo getting kinda close to a G39?

A g35 can give some very impressive numbers, especially with a 6" kkm barrel with better chamber support. SDGlock23 made a consolidated sheet on some heavy 40 loads through a kkm barreled g35. His data "which is also in the 40 caliber section" is posted below.

Power Pistol

G35 6" KKM:
(1x Win) 8.0gr Power Pistol, 165gr Sierra JHP @ 1.130": 1,243 fps
180gr MGJHP @ 1.120", 7.2gr Power Pistol and 1x Winchester brass,CCI SP: 1,183 fps
180gr MGHP, 7.5gr Power Pistol @ 1.150", 1x Win : 1,200 fps avg.
180gr RNFP, 7.2gr Power Pistol @ 1.130": 1,225 fps (17 fps ES)
180gr MG JHP, 7.8gr Power Pistol @ 1.135": 1,247 fps (33 fps ES)
180gr MG JHP, 8.0gr Power Pistol @ 1.135": 1,272 fps (40 fps ES)
200gr Rainier RNFP, 6.5gr Power Pistol @ 1.125": 1,110 fps (16 fps ES + very efficient @ 84+ ft-lbs per grain)

Longshot

G35 6" KKM:
135gr Nosler JHP, 12.6gr Longshot @ 1.125" (1x Fed, CCI SP): 1,849 fps (31 fps ES) That's 1,026 ft-lbs!
155gr XTP, 10gr Longshot @ 1.125": 1,328 fps (1357 fps for two highest, 12 fps ES)
155gr Rem JHP, 10.8gr Longshot @ 1.125": 1,554 fps (50 ES) That's 831 ft-lbs!
165gr Gold Dot, 9.0gr Longshot @ 1.130" (1x Fed, CCI SP): 1,412 fps (23 fps ES)
165gr Gold Dot, 9.5gr Longshot @ 1.130" (1x Fed, CCI SP): 1,485 fps (46 fps ES) That's 808 ft-lbs!
170gr SWC, 9.0gr Longshot @ 1.125": 1,449 fps (20 fps ES)
180gr Rainier RNFP, 8.0gr Longshot @ 1.135": 1,274 fps (39 fps ES)
180gr hardcast RNFP (same), 8.5gr Longshot @ 1.130": 1,294 fps (73 fps ES)
180gr hardcast RNFP (1x Fed, Fed SP), 8.2gr Longshot @ 1.130": 1,301 fps (64 fps ES)
180gr MG JHP, 8.5gr Longshot @ 1.130": 1,327 fps (15 fps ES)
180gr MGJHP, 8.8gr Longshot @ 1.125": 1,402 fps (46 ES) That's 786 ft-lbs
200gr Nosler JHP, 6.5gr Longshot @ 1.130": 1,135 fps (60 ES)
KKM 1.250" OAL (6" KKM G20 .40 barrel):
180gr Rem JHP, 9.2gr Longshot @ 1.250" (1x Win, Fed SP): 1,351 fps
180gr XTP, 9.2gr Longshot @ 1.200": 1,362 fps (31 fps ES)
200gr XTP, 8.5gr Longshot @ 1.250": 1,302 fps (28 fps ES)
200gr XTP, 8.8gr Longshot @ 1.250": 1,294 fps (25 fps ES)
200gr XTP 9.0gr Longshot @ 1.250": 1,338 fps (54 fps ES)

Blue Dot

G35 6" KKM:

180gr MGJHP, 9.0gr Blue Dot @ 1.125": 1177 fps
180gr MG JHP, 9.0gr Blue Dot @ 1.100": 1201 fps (nicely consistent)
180gr RNFP, 9.0gr Blue Dot @ 1.130": 1,309 fps (9 fps ES!)
200gr Missouri Steeler, 8.5gr Blue Dot @ 1.130": 1148 fps
200gr Nosler JHP, 8.5gr Blue Dot @ 1.130": 1165 fps (52 ES)

800-X

G20 6" KKM conversion bbl:

180gr XTP, 9.0gr 800x @ 1.135": 1,339 fps (19 fps ES)
200gr WFNGC, 8.0gr 800x @ 1.100": 1,221 fps (20 fps ES)
Long OAL .40 S&W:
180gr XTP, 10.5gr 800x @ 1.250": 1,454 fps (14 fps ES)

G35 6" KKM:

135gr Nosler JHP, 12.0gr 800x @ 1.135": =1711 fps (877 ft-lbs)
(1x Win) 10.0gr 800x, 155gr Gold Dot @ 1.150": 1473 fps
155gr XTP, 10.4gr 800x @ 1.140": 1514 fps (790 ft-lbs)
165gr Gold Dot (1x Win) 8.5gr 800x @ 1.125": 1295 fps (20 fps ES)
165gr Gold Dot(1x Win) 9.0gr 800x @ 1.150": 1365 fps (14 fps ES)
165gr Gold Dot, 9.5gr 800x @ 1.135": 1418 fps
175gr Win STHP, 8.4gr 800-X @ 1.160": 1285 fps (18 fps ES)
(1x Win) 8.4gr 800x, 180gr XTP @ 1.150": 1276 fps
(1x Win) 8.5gr 800x, 180gr XTP @ 1.135": 1281 fps
180gr XTP, 8.8gr 800x @ 1.130" (1x Fed, CCI SP): 1,327 fps (31 fps ES)
180gr Laser Cast RNFP hardcast, 8.5gr 800x @ 1.135": 1,338 fps (715 ft-lbs) 15 fps ES
180gr XTP, 9.0gr 800x @ 1.150": (1x Fed, CCI SP): 1,358 fps (12 fps ES) That's 737 ft-lbs
200gr Rainier RNFP, 7.5gr 800x @ 1.130": = 1,133 fps (37 fps ES)
(1x Win) 7.5gr 800x, 200gr XTP @ 1.150": 1147 fps
200gr WFNGC, 7.5gr 800-X @ 1.150": 1180 fps (22 fps ES)
200gr TCFP (Missouri Steeler), 7.5gr 800x @ 1.135": 1,188 fps (15 fps ES)
200gr XTP, 8.0gr 800x @ 1.130": (1x Fed, CCI SP): 1,193 fps (20 fps ES)
200gr WFNGC, 7.7gr 800x @ 1.125" (1x Fed, CCI SP): 1210 fps
200gr XTP, 7.7gr 800X @ 1.130" (1x Fed, CCI SP): 1,228 fps (52 ES) Two highest: 1,244 fps, 9 fps ES)
200gr XTP, 8.2gr 800x @ 1.150": (1x Fed, CCI SP): = 1,244 fps (22 fps ES) That's 687 ft-lbs
200gr WFNGC, 8.5gr 800x @ 1.120": 1252, 1280 = 1,266 fps (28 fps ES)
200gr XTP, 8.5gr 800x @ 1.140": 1,272 fps
200gr WFNGC, 8.3gr 800x @ 1.120": 1,278 fps (15 fps ES)
220gr SNS hardcast TCFP, 6.5gr 800x @ 1.150": 1091 fps (29 fps ES)
(1x Win) 6.2gr 800X, 230gr WFNGC @ 1.150": 1066 fps
"230gr" WFNGC, 6.5gr 800x @ 1.140"ish: 1071 fps (15 fps ES)

VV 3N38
G35 6" KKM:
135gr Nosler JHP, 12.3gr VV 3N38, New Win @ 1.130": 1607 fps (10 fps ES)
155gr Rem JHP, 10.8gr VV 3N38, New Win @ 1.130" : 1404 fps (15 fps ES)
(I did run in and load a 155gr XTP over 11gr of 3N38 @ 1.150" and it did 1424 fps)
165gr FMJ, 10.2gr VV 3N38, New Win @ 1.130": 1314 fps (note: @ 1.120")
165gr Gold Dot, 10.7gr 3N38 @ 1.150" : 1392 fps avg ( 7 fps ES)
175gr Win STHP, 9.8gr 3N38 @ 1.140": 1288 fps (645 ft-lbs) 17 fps ES
180gr MGJHP, 9.2gr VV 3N38: 1205 fps
180gr LaserCast RNFP hardcast, 9.8gr 3N38 @ 1.135": 1338 fps (715 ft-lbs) 9 fps ES
180gr Hornady XTP, 9.5gr 3N38 @ 1.150" : 1269 fps avg (13 fps ES)
200gr WFNGC, 8.2gr VV 3N38 (1.150") = 1137 fps
200gr WFNGC, 8.5gr 3N38 @ 1.150" : 1195 fps avg (very consistant, 10 fps ES)
220gr SNS hardcast TCFP, 6.8gr 3N38 @ 1.150": 1011 fps

 

Because i can.

 

Hey guys, thanks for the good informative responses. Think I'm getting the picture of your fondness for the 10mm, increased power over the 40cal but still in a semi-auto platform. I've noticed when folks order custom 1911's for hunting purposes seems like 10mm is the most popular caliber of choice. Makes sense.

 

Why 10? Because it's better than the 40 in every single way no matter how you downplay it. Some will say if you pump up the 40, it approaches the 10. You can pump up the 10 and its game over. The 40vs 10 debate is like comparing the .38 vs the 357 mag.

I'm not recoil sensitive now nor do I have small hands so the 10mm is what I like.

 

I have heard that if I took a G29/G20 and loaded the magazines with plain ol' .40S&W ammo that it would be just fine for practice and not waste as much money.............

 

The rumor is Glock is coming out with a long slide 10mm. Along the lines of a Glock 41...could be cool.


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My G20 is the only handgun I own that I would trust as a backup when I hunt dangerous game. I have a 357 magnum wheelgun, but an extra 9 rounds is comforting.

A .40? I own 3, two being Glocks. I would never think either one sufficient.

Once the G20 surely saved my keister.

 

Next size up from 9mm...

 

Most like the 10mm because it's a 10mm, it has developed into some sort of mythological status because people continue to think the 10mm is clearly superior in every way to any other Glock chambering.

But when you fairly compare it to the .40 S&W, it's not much faster. I've said it before and I'll say it again, if someone had the equipment to test it out, if you took a 10mm and a .40 S&W and loaded both with:

- The same bullet
- The same barrel length
- Used the same powder
- Loaded both to as close to the same pressure as possible...(see chart below)

You would find the difference in velocity between the two would, most of the time, be less than 75-100 fps.

But I have to watch what I say because it's not popular to talk in any way negatively about the 10mm. I actually think it's a great cartridge but I just think the .40 S&W makes more sense, but again, I don't care what one person likes or doesn't like.

The .40 Super, .45 Super and 460 Rowland are all a big step up over the 10mm in terms of power, especially the .45 Super/Rowland as it shoots bigger and heavier bullets.

~125 fps difference yet the 10mm is loaded to higher pressure with a longer barrel. Even that out and the difference is pretty slim.

Why 10? Because it's better than the 40 in every single way no matter how you downplay it. Some will say if you pump up the 40, it approaches the 10. You can pump up the 10 and its game over. The 40vs 10 debate is like comparing the .38 vs the 357 mag.

No, if you pump up the 10mm and pump up the .40 there isn't much difference as long as you keep both on a remotely fair playing field. Also, any additional velocity you get by pumping up the 10mm doesn't really improve anything because at that point, you're pushing the JHP faster than it was designed for and performance (mainly penetration) begins to suffer.

That's not so say it won't work, it just means that the old thought of faster is always better isn't always true, most rifle guys know this. Sure it can be but in this case, the big advantage the 10mm guys think they're getting isn't really there.

Also the .40 vs. 10mm is nothing like comparing the .357 Mag to the 38 Special. Sure on the outside it's similar, but the 357 Mag can operate at around twice the pressure and, to further make my point, you have .357 Mag specific bullets that are designed for its 400-500 fps advantage over the 38.

The 10mm and .40 run at practically the same pressure, so any advantage you see is only going to be around 100-150 fps at most (again, comparing the two fairly) and in the world of ballistics, I'm not convinced that 100-150 fps makes any notable difference once you've already met and surpassed a bullets level of integrity.

For instance if I take a 6" .40 and run a 180gr at 1350 fps and a 6" 10mm and run one at 1450 fps, some firmly believe the 10mm is clearly better in every way, shape and form. But if the bullet already starts fragmenting and coming apart at 1200-1250 fps, what's the use of driving it faster and faster?

BUT! I'm not trying to step on toes here, shoot what you like but I just wish more people would wake up and realize some of this stuff instead of just accepting all the hoopla they hear and assuming it's true.

 

Why???? Because I live in black bear country and take the dog walking and go bike riding thru there. 16 rds of Underwood ammo gives me comfort. I may NEVER see a bear but prepared anyway.

 

Most like the 10mm because it's a 10mm, it has developed into some sort of mythological status because people continue to think the 10mm is clearly superior in every way to any other Glock chambering.

But when you fairly compare it to the .40 S&W, it's not much faster. I've said it before and I'll say it again, if someone had the equipment to test it out, if you took a 10mm and a .40 S&W and loaded both with:

- The same bullet
- The same barrel length
- Used the same powder
- Loaded both to as close to the same pressure as possible...(see chart below)

You would find the difference in velocity between the two would, most of the time, be less than 75-100 fps.

But I have to watch what I say because it's not popular to talk in any way negatively about the 10mm. I actually think it's a great cartridge but I just think the .40 S&W makes more sense, but again, I don't care what one person likes or doesn't like.

The .40 Super, .45 Super and 460 Rowland are all a big step up over the 10mm in terms of power, especially the .45 Super/Rowland as it shoots bigger and heavier bullets.

~125 fps difference yet the 10mm is loaded to higher pressure with a longer barrel. Even that out and the difference is pretty slim.



No, if you pump up the 10mm and pump up the .40 there isn't much difference as long as you keep both on a remotely fair playing field. Also, any additional velocity you get by pumping up the 10mm doesn't really improve anything because at that point, you're pushing the JHP faster than it was designed for and performance (mainly penetration) begins to suffer.

That's not so say it won't work, it just means that the old thought of faster is always better isn't always true, most rifle guys know this. Sure it can be but in this case, the big advantage the 10mm guys think they're getting isn't really there.

Also the .40 vs. 10mm is nothing like comparing the .357 Mag to the 38 Special. Sure on the outside it's similar, but the 357 Mag can operate at around twice the pressure and, to further make my point, you have .357 Mag specific bullets that are designed for its 400-500 fps advantage over the 38.

The 10mm and .40 run at practically the same pressure, so any advantage you see is only going to be around 100-150 fps at most (again, comparing the two fairly) and in the world of ballistics, I'm not convinced that 100-150 fps makes any notable difference once you've already met and surpassed a bullets level of integrity.

For instance if I take a 6" .40 and run a 180gr at 1350 fps and a 6" 10mm and run one at 1450 fps, some firmly believe the 10mm is clearly better in every way, shape and form. But if the bullet already starts fragmenting and coming apart at 1200-1250 fps, what's the use of driving it faster and faster?

BUT! I'm not trying to step on toes here, shoot what you like but I just wish more people would wake up and realize some of this stuff instead of just accepting all the hoopla they hear and assuming it's true.

without rambling it's quite simple. I'll take that extra 200fps and 200-300 fpe anyday of the week. The 10mm offers quite a bit increase in both speed and energy. By your logic I should settle for a 380 over a 9mm since its marginal if I hand load. Please!

Since people don't reload and that is not an option in law enforcement. Against policy. Here is you a few things to look at by factory ammo that loads both the 40 and 10mm about as high as you're going to get out of a factory round. You'll see the difference is enough to warrant why some of us love the 10mm.

When we shoot the steel swinging tree at work for fun, I see the 40 sometimes take 2 shots to get it to swing to the other side while my 10 hits it so hard it sometimes bounce back. I'll take that. Call it what you want but the 10mm has enough of a edge over the 40. The fact is it isn't and it can't be as powerful as the 10mm no matter how much you try. It's just not possible.

http://www.underwoodammo.com/10mmauto135grainjacketedhollowpointboxof20.aspx

http://www.underwoodammo.com/10mmauto180graingolddotjacketedhollowpointboxof20.aspx

http://www.underwoodammo.com/40sandwp135grainjacketedhollowpointboxof20.aspx

http://www.underwoodammo.com/40sandw180grainjacketedhollowpointboxof20.aspx

 

I'm always amused when you talk about 10mm, you always get someone chiming in saying there isn't much difference the 10 has over the 40. 150-200 in velocity and energy is quite a bit. Enough to warrant I carry a 10. Faster does mean better. Bullet gets there faster. Flatter trajectory, more energy once there. I'll take that advantage isn't it all about the advantage when your life is at stake?

 

So by sdglock23's logic, I should be fine carrying a Glock 42 for duty use over my Glock 17? I mean there's only 150-200 fps difference and only 200 fpe difference like the 10 has over the 40. Wow. :upeyes:

 

A couple of years ago, I sold all my Glocks when I started carrying concealed for the first time. (I was more comfortable with manual safety) I had G27, G35, G39.
G39 (45 Gap) was the first gun I CC'ed. It was a bit bulky at that time, but works for me. I sold it to get an XDs45. It was a perfect size for CC, but 6+1 ammo for this size ? Plus the XDS 45 does not prefer to be hand racking the slide. That is one of the reason I sold it recently. I was looking at the Glock 27 again since I pretty much know how the G27 shoots. I went to look for used one in the classified and saw Glock29SF and I did my research for a few days.

I compared my old G39 to the G29 and it seems close to the size. I remember shooting the G39GAP and love the bulkiness of the slide vs my XDS 45 when it comes to handle the recoil.
The G39 is a bit soft and trigger is better. I looked at some ballistic info on the 10mm and could not believe how powerfull it is, very versatile round. With the G29 excellent ballistic performance in a 10+1 ammo capacity vs my G39 45 GAP and the XDS45, this got to be my perfect gun to carry for winter.

Basically, to answer this thread's question, if you can handle the 10mm recoil and cost of ammo, it is good to carry a hand canon... In the real world shooting, there are obstacle infront of target. Flat trajectory and hard hitting and more capacity in a shorter magazine is a win win ! Just stick to a better brand of ammo like the Underwood, Buffalo bore etc... If you want to stick with more commercialized weak 10mm ammo for CCW, then the 10mm is useless. Just get a 40 S&W.

(Why own 2015 Mustang GT and drive below the speed limit?)

 

I like it because it's the most powerful production cartridge you can put in a production semi-auto pistol without getting a desert eagle. For those that handload, that statement could be debatable. The g20 handles it well.

 

So by looking strictly at the velocity numbers, one can pooh pooh the difference in fps, but plug those numbers into a Bullet Kinetic Energy calculator, and a different story appears.

10mm - 180 gr. bullet@1287fps= 661 ft/lbs
40S&W - 180 gr. bullet@1159fps= 536 ft/lbs

125 ft/lbs of energy is a significant difference. Take 5 25 lb bags of lead shot, tie them together on a rope, and have your strongest friend swing them into your chest...Now you can experience 125 ft/lbs of energy. :rofl:

Now if one hand loads, and shoots a KKM barrel, 1350fps with a 180 gr bullet is plenty safe in my G20SF, with no signs of pressure, and that brings 728 ft/lbs of energy to the fight.

Probably not a big deal if the fight happens in the mall, or the parking lot, but a bigger deal if the fight happens on the walking trail, in Apex predator country. I use to carry a Ruger 41 mag, single action 6 shooter...Now I carry a Glock 20SF 16 shooter. :supergrin: Reloads are faster, too.

Squeeze