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Glock 20SF 500 Rounds Later

3K views 32 replies 16 participants last post by  Gunruner1917 
#1 ·
Just thought I'd share. After 500 rounds I'm starting to get comfortable enough with my 20SF to say I love it! :D

Brown Tan Everyday carry Rectangle Material property


Gun Firearm Trigger Gun accessory Black


Qualified it as a duty weapon tonite as a 40cal. As it is now KKM 40 conversion barrel, Ameriglo plain black rear sight, red fiber optic front, Boodad's grip, Wolff non captured steel guide rod, Wolff 18lb recoil spring, and a Glock - connector. I had tried a Vickers extended slide stop but it wouldn't clear my holster. I may try a Glock extended instead. I had also planned an extended mag release but have been able to get used to the factory release so I'll leave that as is.

450 rounds of Blazer 180 grain plus 50 rounds of Winchester 180 grain JHP (FBI contract over run) so far and no unusual wear. I wasn't too happy with the trigger at first vs. my well used 17C but shooting it plus even more dry fire practice has smoothed it up considerably. Now I can carry it at work and it is safe to say I'm keeping it. :)
 
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#4 ·
There's a couple companies making some nasty .40 cal ammo. I saw the entry and exit wounds to the head of a 171lb bar hog a friend of mine shot to dress for a weekend BBQ. Good thing it was to the head. Nasty. Ammo was Buf Bore .40 cal HP's out of a G23.
 
#6 ·
Are you restricted from carrying 10mm on duty or qualifying with it? Most units around here have moved from the 40 and 357 back to the 45acp in a G21. The folks carrying Glocks, that is.
Seems the 10mm is starting it's climb back up the basement obscurity ladder into main floor popularity. Just a look at Cabelas in store ammo shelf last Saturday showed a 1/2 row of 10mm ammo from 8 different manufacturers, plus at least 10 bags of 10mm Starline reloading brass. I purchased 5 box of the Sig Sauer to try. The $17 a box of fifty with a claimed 1250fps made me do it.
Glad to see 10mm taking it's well deserved place on the shelf and in the display case. The G20SF is now my camp and woods carry.
 
#7 ·
It is my duty gun along with my 17C. Until I leave patrol mainly the 17C. I will be in a plain clothes assignment before the years is up and it will be the 20SF. Our actual issue guns are all gen4 17 or 19. I really like the 17 and 19 but not gen4. I've seen the 9mm fail too many times over the years that I feel a more powerful round wouldn't have. Not trying to start a caliber debate but that is just how I feel about it. My department policy is you can carry any gun on duty that you are willing to provide, get approved, qualify, and provide your own ammo for if it is not a 9mm.

Next year at qualifications I plan on qualifying it as a 10mm if I'm settled on what I feel is an adequate load. Adequate for me is one that I can find ballistic testing for that doesn't show it likely to overpenetrate. I'm still researching that but wanted the gun available now for on and off duty use so I went ahead and qualified it as a 40. I already had a supply of the FBI duty load and it shoots good in my gun.
 
#8 ·
Thanks for the reply. I use the 180gr XTP on top of a 9.4gr charge of 800X with W-W large pistol primers, OAL 1.259". It's a powerhouse and will go straight through a car windshield and into a bucket of sand sitting in the drivers seat. It dumps around 650+ftlb of energy(at muzzle) with 1250fps+- from a 4.6" barrel. It's much easier to control in the Glock 20SF than the standard classic 158gr 357HP from a 6" model 28 Smith. Don't think the 10mm loading would penetrate any worse that the 357 does. Accurate as all get out from zero to 50m. These reloads are faster than the Hornady factory loading but show no over pressure signs in 4 different G20's.
Stay safe out there........Mike
 
#9 ·
Nice! I've got a Dillon Progressive set up just for 40/10mm that I need to put back into action this year. The only thing is no reloads on duty for me. :D

4 different G20's? Dude I hate to admit it but I'm happy enough with mine that I'm considering ditching a brand new Springfield Operator and getting another 20SF or a 29SF. :D
 
#10 ·
They are not all my G20's. My buds have a couple and shot my reloads. I had 2 G20SF's. One had a trigger that neither Glock nor I could get straightened out. It went away. I had to get a new one and I found a Blue label a couple towns away and tried the trigger and it breaks clean at 5lb and a superb reset. It's my 10mm now and has been 100% out of the box.
Never shot a G29 but I would like to. That's the one that would need a tailored loading to use the powder up in the shorter barrel.
Since you can't use reloads for duty give the Sig Sauer ammo a try. Cabelas has it in the FMJ(50 box) for the range and HP for carry, both sporting the same velocity and bullet weight. Much better price than Underwood or Double Tap. Several YouTube videos on the HP version.
Later, Mike
 
#11 ·
Thanks for that. I'll definitely have to look at that (Sig ammo).
I can also understand about the trigger. My 20SF needed a minus connector as the trigger stacked pretty bad to start with. Shooting it and dry fire is improving it though.

The 29 I'm interested in. Honestly though I'm not sure if I won't get another 26 or 27 (had both and both gone now) first if the magpul 12rd mag for the 26 is available soon.
 
#16 ·
I have a 20SF and a Gen4 20. Both guns are phenomenal.

I'm glad you could carry yours on duty. My duty weapon is a G19 Gen 4, but if given a choice it would be one of my 20's.

Good luck with it, and stay safe!
 
#17 ·
You will like the 29 as well. Very convertible taking the 20's mags and longer after market barrels. With the ammo ranging from the 40 S&W power level to way beyond its a great feature to be able to stop at the power level you shoot best in case "nuclear" is a little too much. Over-penetration should not be a problem if the best bullet for its speed is chosen.
 
#20 ·
They have a very sensible policy imo. To carry it as a 10mm next I just have to qualify it again. Qualification is never a problem. We have firearms guys that do love the range still. Some will do it as long as you let them shoot your gun if it's one they haven't tried before. :D
 
#19 ·
Whose ammo will you be using for carry and what receipe?

I'm aware that the finish is not to your or my liking, are you going to address that later. I've thought about used to get the finish I want but am concerned on the lack of care one may have exhibited on a used 20 or 29.
Current carry ammo is this...
http://sgammo.com/product/40-cal-am...ain-bonded-hollow-point-winchester-q4369-ammo
Still debating for when I qualify it as a 10mm.

As far as the finish I plan on it going to Robar in the future. I factored it into the price of the gun and decided it was still worth it to me. The feeling has only grown stronger as I've gotten to spend more time at the range with the gun. It just feels right in my hand.

I wouldn't hesitate to buy any 10mm Glock used if it had the finish I wanted. On used guns I replace all springs anyway. I'm a certified armorer. If you ever were in NC and wanted one done I'd do your gun for free if you provided the springs. :)
 
#21 ·
Thanks for the info.

I work on all my Glocks, stippling and refinishing is another thing. Thanks for the offer, do you feel the Robar will get your piece functioning first round down range? I see a lot of stuff that looks good at first but function then sucks, years of use is worst than the present finish.

Please do let us know how your ammo plays out.
 
#24 ·
Well, it's a great round, but it's had almost 35 years to make others obsolete. Not happening...
It's a matter of opinion, but it's not hard to make an argument for the caliber considering you can carry 16 rounds with a G20. And while double-taps may be fun to practice, any reasonable person would prefer the increased one shot stop factor the 10mm provides.
 
#25 ·
Thanks for the info.

I work on all my Glocks, stippling and refinishing is another thing. Thanks for the offer, do you feel the Robar will get your piece functioning first round down range? I see a lot of stuff that looks good at first but function then sucks, years of use is worst than the present finish.

Please do let us know how your ammo plays out.
With Robar they would only have to refinish a slide so I'd think it would be right the first time given their reputation. Went to the range today and tested with lighter springs. It definitely likes a heavier spring even with just 40cal ammo. Lighter than 20 pounds and I was getting some failure to go into battery once I got the gun good and dirty. :D
 
#27 ·
I would love a 10mm but ammo is just to pricey to justify the investment. I'll stick to my .357 magnum and .45acp for my big bore fun. Enjoy and be safe.
 
#28 · (Edited)
Well, it's a great round, but it's had almost 35 years to make others obsolete. Not happening...
I think that pistol shooting dynamics are different now then back in the 1980's when we first saw the 10mm considered. Better technique, weapons availability and many, many more shootings with handgun caliber ammunition. Will it be crazy like the 25 year wave of the 40 S&W? Who knows. But its on the comeback trail for sure. My thought is that it is a much more versatile weapon system for those who have some degree of mastery of the art of pistol shooting.
 
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#30 ·
I agree, those not in the .45 circle might see more options with the 10mm especially in reloading and the growing receipes being offered. I see the logical handoff from 9mm to 10mm for those that want more and in what quantity.

I reload for 9mm and 44 mag. If I was younger the 10mm would be my next pursuit.
 
#29 ·
It is my duty gun along with my 17C. Until I leave patrol mainly the 17C. I will be in a plain clothes assignment before the years is up and it will be the 20SF. Our actual issue guns are all gen4 17 or 19. I really like the 17 and 19 but not gen4. I've seen the 9mm fail too many times over the years that I feel a more powerful round wouldn't have. Not trying to start a caliber debate but that is just how I feel about it. My department policy is you can carry any gun on duty that you are willing to provide, get approved, qualify, and provide your own ammo for if it is not a 9mm.

Next year at qualifications I plan on qualifying it as a 10mm if I'm settled on what I feel is an adequate load. Adequate for me is one that I can find ballistic testing for that doesn't show it likely to overpenetrate. I'm still researching that but wanted the gun available now for on and off duty use so I went ahead and qualified it as a 40. I already had a supply of the FBI duty load and it shoots good in my gun.
Have you considered Hornady 10mm 175gr Critical Duty. It is an excellent round. It is not loaded to maximum potential velocity. But, it is loaded to a velocity that works quite well with that bullet. Better than the same load in .40 S&W, at least in my opinion. The down side is that it is not available in cheaper 50 round boxes. Not that I have found anyways.

If you have no qualms or your department has not restrictions regarding the manufacturer, Georgia Arms loads a very good 10mm round with the 180 gr Gold Dot. It is loaded to about 1180fps out of a Glock 20. They list 1200fps, but from chronograph tests it is just a bit slower. I believe that is an excellent velocity for that bullet, better than the velocities that Speer loads the same bullet to in their .40 S&W loads. Georgia Arms will also load the 165gr Gold Dot for you if they have them in stock. I called them a while back when they had no 10mm available on their website and they informed me that they had 400 165gr Gold Dots in stock and would load them for me at a velocity of about 1300fps. I would guess it would work out to about 1260 to 1300 fps out of my 20.
 
#31 ·
I am looking into Hornady and Georgia Arms and Underwood among others still. Suprisingly it is a daunting task as so many options do exist for the 10mm. I also am becoming of the mind (after reading an article on the subject and thinking on it) that overpenetration of certain rounds is worried about too much by leo as long as the bullet performs as it should while still in the person/animal.
 
#32 ·
I am looking into Hornady and Georgia Arms and Underwood among others still. Suprisingly it is a daunting task as so many options do exist for the 10mm. I also am becoming of the mind (after reading an article on the subject and thinking on it) that overpenetration of certain rounds is worried about too much by leo as long as the bullet performs as it should while still in the person/animal.
Yes, I agree. In addition, over penetration with a 10mm becomes even less of a risk due to the additional velocity. The same bullets are being used as with a .40, they open up a bit more and therefore usually (but not always) penetrate less. For example, the 10mm Critical Duty (according to Hornady) penetrates about .25" less in bare gel but .25" more in heavy clothing covered gel.
http://www.hornadyle.com/products/handgun/critical-duty/10mm-auto-175-gr-flexlock
http://www.hornadyle.com/products/handgun/critical-duty/175-gr-40-s-and-w
 
#33 ·
When did Glock move the "SF" from the pig nose to the grip?
I emailed Glock and they only answered that it was a recent manufacturing change and "Don't Worry About It". I suppose we are now required to put out tail between our legs and slink away for asking questions of the great holly "GLOCK!". They never answer with more than we did it and it's OUR business..........Not the consumer... Just my $.02...........Shoot safe, Mike
 
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