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10mm/357sig

13K views 102 replies 45 participants last post by  Short Cut 
#1 ·
Hey guys quick question, what are your thoughts on 357sig vs 10mm. I'm looking to pick up something full sized and I'm not sure if I want to go Glock 31 or 20. What are your thoughts on ammo price, recoil, and ballistics when it comes to those two rounds? I've kind of ruled out the glock 21 only because I can get more power out the same frame size on a G20. The gun will occasionally be carried also if that makes a difference.
 
#35 ·
If you have a 10mm you can get a conversion barrel to shoot 357Sig. I like the flat shooting penetration of the 357Sig. Velocity is very consistent and accuracy is excellent. In my Glock 20C 10mm I have 357Sig and 40S&W barrels and can shoot any of the three rounds without changing magazines, slides, or springs. You only need the barrel.

I now have even more desire to add a G40 MOS.

A conversion.357 barrel will be a lot of fun.

I've gotta get back into reloading again. Too much fun to be had.
 
#37 ·
Most of the 10mm I can find doesn't match the original specs of the original Norma ammo. If I remember correctly, the original 10mm ammo was running about 1400-1500 fps. Now most of the 10mm I can finds barely makes it to 1200 fps which barely puts it above 40S&W while the 357 Sig depending on bullet weight is running anywhere from 1250 - 1450 fps. 9mm is running about 1200.

My bottom line was that I like the 10mm and 357Sig and if you get a 10mm you can also shoot 40S&W and 357Sig with extra barrels. I just bought a G23 40S&W so I could shoot 357Sig with an additional without the bulk of the G20 I use.

When reloading 357Sig you can use the 40S&W carbide sizing die first and then the 357Sig sizing die just sizes the neck. This way you don't have to lube the case. I have a five stage press so it's just another station..
 
#39 ·
I like 357 Sig and 10mm.
Have Glock 32 and 20SF, so not "apples to apples" but /anyway ...
Different grip sizes, I like the larger grip, smaller frame size is okay too.
Different slide width, no biggie to me carry either IWB.
Much prefer loading 10mm (hand loading) 357 Sig is PITA to hand load IMO.
Either exceeds 500# KE with factory ammo.
1mm bigger bullet diameter of 10mm achieves desirable starts with a "4" status. :supergrin:
Glock 32
Speer Gold Dot 125 gr. @ 1,344 fps / 501# KE
Federal HST 125 gr. @ 1,358 fps / 512# KE
Glock 20 SF
Corbon 150 JHP @ 1,276 fps / 542# KE
Handload Nosler 150 JHP @ 1,274 fps / 541# KE
Hornady 155 XTP @ 1,335 fps / 614# KE
Handload 155 XTP @ 1,366 fps / 642# KE
Hornady 175 gr. Critical Duty @ 1,158 fps / 521# KE
Handload 180 gr. Gold Dot @ 1,146 fps / 525# KE

To preempt the near certain comment about how I could get boutique 10mm ammo that delivers over 700# KE - I know already. ;)
 
#42 ·
Good video, bear spray did not do the job this time. Personally Glock does not make anything that I would be comfortable against a grizz.
I believe I read Canada issues 10mm to LEO that might run into polar bears.

I noticed the Alaska troopers always seem to take a shotgun when they are wandering around in the woods and there might be bears. I guess they don't believe in bear spray.
 
#44 ·
The Danish Sirius Dog Sled Patrols (guys make our Seals look like wimps) carry 10mm Glocks and 30-06 bolt actions for polar bears. These patrol the FAR Arctic for up to 6 months in 2 man teams with a dozen sled dogs or in kayaks. No human contact, no re-supply, etc.
 
#45 ·
When I was working up north on a special project, all they gave us was 12guage shotguns with popper loads to scare the bears away. The guys with the real guns were on a perimeter around us. Would have felt better if they had been next to us.
 
#47 · (Edited)
The problem with the 9X25 Dillion is that there is no ammo available that is made (designed) for it. The ammo offered by Underwood uses 9mm bullets needless to say the 9X25 speed is way faster than what these bullets were designed for to achieve the best performance. But Underwood offers a round for the 357 Sig loaded with a Gold Dot 357 Sig bullet which even at 1500 fps still performs as designed. The Lehigh bullets are cool but I can get 1700 fps in a 357 Sig with these bullets so the 9X25 is not needed with these.
 
#51 ·
Last deer season I dropped a coyote from my deer stand. I knew the hunt was ruined for the day so I stuck around until sunset to see if any more 'yotes showed up. Just past sunset I climbed out of the stand, left my rifle and walked out to get the kill with a .38 on my hip. This is what I usually do with deer (easier to drag a deer without dealing with the rifle).

I'm dragging the dead coyote to the truck and I hear at least 2 other coyotes howl. Rational or not, I feel under gunned with the .38. I had convinced myself that resolution would come with a g31 but this thread has me thinking a g20 with the 357 sig conversion barrel is the way to go.
 
#60 ·
''a g20 with the 357 sig conversion barrel is the way to go.''

I posted this in post #12 of this thread,

http://www.glocktalk.com/threads/grt45-archive.1421823/#post-22283466

I also have two g 20s to use the barrels in and they work great.

I got the six inch barrels in 9mm, 357sig, 40 and a 6.6''
threaded 10mm.

You will get much more power from the longer barrels,
like over 1600 fps with UW 124gr 357 sig ammo.

The G20 and G21 are the most versatile guns Glock makes.

Some more info that got me started with this project,

http://www.glocktalk.com/threads/glock-30-30sf-30s-information.1421425/

As I said in post 12, I have done most of what is in
both of those links and more, I like the G20/21 better than
the G30/29.
 
#52 · (Edited)
For me, frame size was an issue.

I really like the G23.4, so I got a 5.3" LWD 357 SIG Bbl for it, and HDY Custom 147 gr. XTP and S&B 140 gr. FP ammo.

The 147 gr XTP has a muzzle velocity in excess of 1300 FPS, and a muzzle energy in excess of 570 LB-FT, ~ a 50% increase over the 180 gr. .40 it replaces.

The Custom 147 gr. XTP bullet is not the 9mm catalog offering, but a heavier, cannelured revolver style bullet only available in the Custom loading.

...and it shoots very flat, and gives 9mm point blank range performance at 100 yards.

I consider it a very good non-dangerous game round.

For beasts, I have a 6-1/2" Ruger BH 357 Mag. with thermonuclear 180 gr HDY XTP hand-loaded to the same velocity, ~ 1300 FPS.




Nutter
 
#58 ·
You have some great info here already.
Think of the 357 as shootable in a mid sized gun, it's a 9 mm going very fast.
Think of the 10 mm as a very heavy .40 going very very fast out of a large framed gun.

The 357 is great at self defense , the 10 mm is a larger bore and heavier bullet suited for protection from game and serious protection from humans. I think the 10mm is really coming up in popularity now and has more options for ammo and guns.
 
#59 ·
You have some great info here already.
Think of the 357 as shootable in a mid sized gun, it's a 9 mm going very fast.
Think of the 10 mm as a very heavy .40 going very very fast out of a large framed gun.

The 357 is great at self defense , the 10 mm is a larger bore and heavier bullet suited for protection from game and serious protection from humans. I think the 10mm is really coming up in popularity now and has more options for ammo and guns.
Actually there are more guns made in 10mm than 357 Sig but much more ammo is made for the 357 Sig. The guns and ammo companies are all about the 9mm now so don't expect anything to change in the near future. One thing I can predict is the girls at the FBI will not be shooting either the 10 or 357 anytime soon!
 
#62 ·
"There's a reason you carry a gun in the woods. You cops and prison guards remember going in the gassed room to rescue the dummy? We had to do it with no mask, then with a mask. It sucked both ways but we still went in. I'd imagine some mad bears will shake off spray without incident, or at least get in a couple 'now you know me' chomps."

No comparison! I've had three kinds (a cop demonstrated MACE to us one night in the Army when he brought some AWOL dude back; Army gas training, and accident with pepper spray). I couldn't see with the Army stuff and police stuff but could function=pepper spray took me out). Easiest way to solve the spray OR prey ;-) dilemma is to look up the statistics. In the last 10-15 years there have been dozens of studies=all show bear spray is better for you and the bear.
 
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#64 ·
"I just studied the dude that was bleeding. I'll stick with bullets."

There are always exceptions. What if he hadn't had spray?

In 20 years. I've seen photos of several that weren't bleeding (any more). Also, a couple of gunshot wounds that did more damage than the bear did.

I use spray when on duty, spray and a pistol when on my own (a custom 454).
 
#65 ·
There are always exceptions. What if he hadn't had spray?
I don't know what you meant by the rest of your post, but as an outdoorsman, I don't go in the scrub without a gun, so that leaves me out of the 'what if'. I suppose 'what if I miss' could come into the equation, but I'd have to chalk that up to 'it was my time to go'.

I think anyone who goes in an area where dangerous animals live, without a gun, is trying to win a Darwin award. A lot of those things you read about could have been avoided with a gun and some training. I'm in no way EVER counting on spray. The stats can kiss my watootie.
 
#69 ·
"After 30 yrs of dragging her through palmettos and briar patches, she'd probably appreciate that, more."
;-)

Mine spent our 10th anniversary with me driving through the national forest radio tracking bears in the dark, opening the gates, etc. Where we were, we had to be unarmed due to local and state law. We celebrated the next night which was a Saturday.

"Couldn't care less about that statistic. If a bear is going to try and attack me, I don't give a crap about being "Better for the bear" "

Unless you are the HALF that get killed or seriously injured while using a firearm or the State determines you fired too soon and you face State or Federal charges.

Don't get me wrong. . there is a place for guns and a place for spray. It's just your chances are almost twice as good of avoiding injury, especially serious injury, or death. I often carry both.

We've gotten off topic enough. I sometimes carry my 10mm, sometimes my 454, sometimes my 357 Sig. All depends.
 
#73 ·
Where we were, we had to be unarmed due to local and state law.

We've gotten off topic enough.
If I can't take a 10mm or a .357 Sig (or my G41) I'm just not going. You could prolly do it a thousand times but it only takes once. I have a great fear of being eaten. FWIW, when it comes to 10mm or .357 Sig in the woods, I'll take either one, but I'd rather have the Sig. Power factor numbers tell me I'm going to be able to get more bullets on target when shooting fast, a skill I recommend anyone who goes in bear country to have. Doesn't hurt to have it when hunting large hogs, too. ;)

eta - oh yea...leave all the quote brackets and the entire quote will show in the box.
 
#70 ·
if only choosing one, i would go G20 and get a 357sig aftermarket barrel. the parent case in both calibers is 10mm, so you can always shoot 357sig out of 10mm gun so long as barrel is swapped. the glock 10mm mags feed the 357sig just fine.

to me the question here comes down to what calibers you want to shoot. if you want 40/357 capabilities then go with a G31 or G22 and get the other necessary barrel. if interested in 10mm then most definitely go G20 and get whatever other barrels you want (357sig, 40, 9x25).

i love the G20. if the springs are upgraded correctly it shoots full power 10mm loads super soft and comfortable. could shoot the G20 all day long.
 
#72 ·
The G20 (10mm) has a larger frame (grip) than a Glock 31 (357 SIG).

Both can hold the same amount of ammo (15 Rounds).

10mm has more energy than a 357 SIG, but 357 SIG has a flatter trajectory.

The G20 is heavier than a G31.

You can buy a 357 SIG barrel for the Glock 20, but you can't buy a 10mm barrel for the Glock 31.

Ammo costs about the same.
 
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