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Old 08-24-2012, 12:17 AM   #1
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Default Better stopping power 40 cal or 357?

I have a GLOCK G 27 and can buy a .357 barrel and shoot 357 bullets. Why would I do that unless 357 bullets have better stooping power???

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Old 08-24-2012, 03:01 AM   #2
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Quote:
Originally Posted by Nat_Turner View Post
I have a GLOCK G 27 and can buy a .357 barrel and shoot 357 bullets. Why would I do that unless 357 bullets have better stooping power???
"Stopping power" is a topic that is discussed endlessly, never ended. There are .40SW defense loads with over 500 ft-lbs of muzzle energy, equvalent to the best .45ACP defense rounds. Plenty lethal.

I don't shoot .357 SIG rounds such as you can in your Glock, but the .357 magnum (revolver) rounds are known for high stopping power. There is a school of belief that lighter rounds going very fast stop better than heavy slower ones, that being seen in ammo makers when they generally use a lighter grain bullet loaded up to +p in their defense loads.

Both .40SW and ,357 SIG are lethal, urban mythology probably would say the .357 is a bit more so but shot placement dominates anyway not caliber.
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Old 08-24-2012, 03:05 AM   #3
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I personally dont have much experience with either round, but i agree with bountyhunter that shot placement is the key regardless of the cailber or cartridge. That said i personally wouldn't cc anything smaller than a .380 but thats me.

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Old 08-24-2012, 03:10 AM   #4
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image-2548709901.jpg



image-589482940.jpg


Hope this helps.
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Old 08-24-2012, 05:29 AM   #5
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Quote:
Originally Posted by Nat_Turner
I have a GLOCK G 27 and can buy a .357 barrel and shoot 357 bullets. Why would I do that unless 357 bullets have better stooping power???
Hmmm... I know that other Glock .40 pistols could be converted but I wasn't aware you could convert a G27 to .357 SIG......

Either way, they are both lethal rounds that shoot fast and hit hard.
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Old 08-24-2012, 02:50 PM   #6
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You are splitting hairs if you are trying to determine which one has more "stopping power". If you shoot the 40 well, stick with it.

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Old 08-24-2012, 03:11 PM   #7
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Both calibers are pretty equal. The .357 Sig shoots a little flatter and penetration may be just a tad bit better (apples/oranges here). The one advantage to the .357 Sig is feed reliability. Since the case is a necked down case, with smaller diameter bullet,it feeds well, usually more reliable.
And to answer the question as to whether you can shoot .357Sig in a G27...yes you can..get a barrel, and use your mags, it works. You can also get a 9mm barrel and use G26 mags also but ejection issues may change your mind here as far as 9mm. The conversion works however but would not be my choice to use for CCW.

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Old 08-24-2012, 08:26 PM   #8
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.40S&W is a great round:
Parent case 10mm Auto
Case type Rimless, Straight
Bullet diameter .400 in (10.2 mm)
Neck diameter .423 in (10.7 mm)
Shoulder diameter .423 in (10.7 mm)
Base diameter .424 in (10.8 mm)
Rim diameter .424 in (10.8 mm)
Rim thickness .055 in (1.4 mm)
Case length .850 in (21.6 mm)
Overall length 1.135 in (28.8 mm)
Case capacity 19.3 gr H2O (1.255 cm³)
Rifling twist 1 in 16 in. (406 mm)
Primer type Small Pistol
Maximum pressure 35,000 psi (240 MPa)
Ballistic performance
Bullet weight/type Velocity Energy
135 gr (8.7 g) Federal Premium JHP Reduced Recoil 1,190 ft/s (360 m/s) 424 ft·lbf (575 J)
155 gr (10.0 g) Guardian Gold JHP 1,205 ft/s (367 m/s) 500 ft·lbf (680 J)
165 gr (10.7 g) Remington Golden Saber 1,150 ft/s (350 m/s) 485 ft·lbf (658 J)
180 gr (12 g) Magtech FMJ-FP 1,050 ft/s (320 m/s) 441 ft·lbf (598 J)
200 gr (13 g) Doubletap FMJ-FP 1,050 ft/s (320 m/s) 490 ft·lbf (660 J)


However, the .357SIG has great ballistics:
Parent case .40 S&W
Case type Rimless, bottleneck
Bullet diameter 9.02 mm (0.355 in)
Neck diameter 9.68 mm (0.381 in)
Shoulder diameter 10.77 mm (0.424 in)
Base diameter 10.77 mm (0.424 in)
Rim diameter 10.77 mm (0.424 in)
Rim thickness 1.40 mm (0.055 in)
Case length 21.97 mm (0.865 in)
Overall length 28.96 mm (1.140 in)
Case capacity 1.27 cm³ (20 gr H2O)
Rifling twist 406 mm (1 in 16 in)
Primer type Small pistol
Maximum pressure 275.8 MPa (40,000 psi)
Ballistic performance
Bullet weight/type Velocity Energy
60 gr (3.9 g) Special Application Ammunition 2,410 ft/s (730 m/s) 774 ft·lbf (1,049 J)
115 gr (7.5 g) Bonded defense JHP 1,550 ft/s (470 m/s) 614 ft·lbf (832 J)
125 gr (8.1 g) FMJ-FP Match and Bonded defense JHP 1,450 ft/s (440 m/s) 584 ft·lbf (792 J)
147 gr (9.5 g) Bonded defense JHP 1,250 ft/s (380 m/s) 510 ft·lbf (690 J)
147 gr (9.5 g) FMJ-FP 1,255 ft/s (383 m/s) 514 ft·lbf (697 J)



To make your arguement even more difficult.. both rounds are tried and tested by Law Enforcement. .40S&W is the round of choice for many Police Departments, and the FBI. .357SIG is the round of choice for the US Secret Service. .357SIG is loaded in the SIG P226's that protect the President of the United States on a daily basis.

I personally use .40S&W as a training round on the range, but rely on .357SIG as my personal protection round.

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Old 08-24-2012, 09:36 PM   #9
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It's ALL about shot placement! I just read an article in today's newspaper about an on duty under cover cop who shot a knife wielding suspect that was about to lunge through his open unmarked cars passenger window with a knife. The officer shot the suspect in the chest with a .40CAL Glock. Don't know what round he was using and don't know which model Glock. More than likely a Mod 23 or a Mod 22.

The suspect then ran one block and hid in a house where he was later found and taken into custody.

The suspect survived and was sentenced to four years in jail, as he was a gang member. The doctors report later stated the round did not hit any bones or organs. So the bottom line is shoot the weapon and round you shoot best and practice, practice practice!

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Old 08-24-2012, 09:55 PM   #10
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Multiple shots and shot placement with good quality ammo. Arguing calibers is pointless...just make good hits.

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