M&P 40 to 357 sig

Not quite the same but I have the .40 barrel for my M&P 357. No issues. Get the 9mm conversion barrel also and you can shoot 3 calibers from one gun...sweet.
 
It'll just be a barrel swap - be advised though that 357 Sig is one of those odd calibres that never really had a purpose. Eventually it'll fall into the same category as such 'wonder calibres' as 41 Action Express, and 9mm Ultra.
 
mudgunner49 said:
Don't tell the guys at Texas DPS - they use it to shoot LOTS of bad guys and they love it...
Click to expand...

They probably would have had the same results with any good 9mm load.

.357 SIG manages to combine the disadvantages of both 9mm and .40 S&W. In addition, factory ammo is hard to find and expensive and reloading is more work compared with other pistol cartridges.
 
I don't find 357Sig particularly hard to find or even too expensive if you roll your own. It is a snappy round but I will admit that I don't shoot it that much...I end up using the 9mm barrel most. Down south they seem to like it quite a bit more than up here.
 
tjhaile said:
1. They probably would have had the same results with any good 9mm load.

.357 SIG manages to combine the disadvantages of both 9mm and .40 S&W. In addition, 2. factory ammo is hard to find and expensive and reloading is more work compared with other pistol cartridges.
Click to expand...

1. Not according to them. They shoot a lot of felons and as per their legal branch guys have been sued less since the adoption of the .357 Sig (apparently due to lower survival rates);

2. Not an issue with a service gun;
 
I don't buy it. Two questions come to mind:

1. What were they using before the adoption of the .357 SIG? Older JHP designs tend to be less consistent performers than newer ones in any calibre.

2. Has their training program changed? Shot placement is the number one contributing factor to incapacitation.

As the picture below shows, there really isn't much difference in performance between the popular service pistol calibres with good ammunition:
Handgun_gel_comparison.jpg


Additional commentary from Dr. Gary K. Roberts, who is probably the foremost expert on wound ballistics:
http://m4carbine.net/showthread.php?t=19887
http://www.m4carbine.net/showpost.php?p=259169&postcount=60

Ammunition cost most certainly is an issue, be it for the private citizen or agency use. Less expensive ammo means more rounds available for training for a given budget. Furthermore, why should the taxpayer be on the hook for ammunition that costs more without doing anything better?
 
tjhaile said:
I don't buy it. Two questions come to mind:

1. What were they using before the adoption of the .357 SIG? Older JHP designs tend to be less consistent performers than newer ones in any calibre.

2. Has their training program changed? Shot placement is the number one contributing factor to incapacitation.

As the picture below shows, there really isn't much difference in performance between the popular service pistol calibres with good ammunition:
Handgun_gel_comparison.jpg


Additional commentary from Dr. Gary K. Roberts, who is probably the foremost expert on wound ballistics:
http://m4carbine.net/showthread.php?t=19887
http://www.m4carbine.net/showpost.php?p=259169&postcount=60

Ammunition cost most certainly is an issue, be it for the private citizen or agency use. Less expensive ammo means more rounds available for training for a given budget. Furthermore, why should the taxpayer be on the hook for ammunition that costs more without doing anything better?
Click to expand...

1. 9 and .45 - not sure what bullet;

2. I don't know, however they do shot lots of folks in and around cars therefore that becomes the basis for much of their enthusiasm;

3. I am fully aware of Doc Roberts' work and have corresponded and spoken with him fairly extensively. That graphic displays very well what happens in unprotected gelatin, however the intermediary effects of auto glass and body metal are factors - Texas DPS is not always shooting thinly clothed tissue or gelatin blocks;

4. WRT your last statement I was speaking more to availability as opposed to cost. Buying in the volume that they do brings cost down significantly. Even here in Ontario buying on the LE co-op costs are way down. .45 ACP Ranger T is actually as cheap, if not cheaper than ball. Not as cheap as 9 or 40 but cheap enough that they can shoot what they choose...
 
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