Is the m&p 9c capable of firing +P+ ammo? In the manual it says absolutely not and when I called s&w they said the same thing. I don't wanna feed this thing a ammo thats gonna make it explode. Yes this is gonna be a carry ammo probably the underwood 124 or 147 speers rated for +P+ I also intend on useing the 115 grain +P+ extreme defender. It won't be a steady diet. A mag or two of the ammo I ultimately decide to carry just to ensure it functions in the gun.

When the manual and S&W both say no to +P ammo, I don't use it

A quick Google search returned dozens of results on this matter. It appears previous threads on here state it will be fine but not recommended.

IMO the slower follow up shots from the increased recoil and muzzle rise negate any positives. Personally I would buy HSTs in a standard pressure or +p and forget about the +p+

Yes perfectly fine.

These guns were manufactured with the idea to sell to military and law enforcement. The military uses 9mm NATO which is 9 +p. Many police departments use +P ammo as well.

I'm not sure I'd use +p+ though. You really won't see the desired results in short barrels.
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A 3" Kahr and a 3.5" C9 will both do nicely with just +P ammo.

Plenty of fps to get the needed ft/lbs of energy, plus there is
plenty of quality ammo out there...................
so you DON'T need the +P+ ammo.

Standard 124 and 147gr Gold dots and HST will also work in my short barrel.

However you do what ever tickles your tootsie.

As previously discussed here in relation to both 9 mm and .38 Special, there is no +P+ pressure standard. I think Federal tells everyone what pressure their load of this type (the 9BPLE) generates, about 3,000 psi higher than +P, I think, but absent this information no one knows. So if you call the factory and ask will a 9 mm load of very high but unknown pressure if safe to fire (in a gun they cannot examine), their answer is not at all surprising.

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Alan
SWCA LM 2023, SWHF 220

I'll admit I am still learning on all of this, but if any increase in performance out of a +P+ round is negligible, and the manu states not to use it (potential warranty issue then?) is there any real benefit to even using said ammo?

Just picking up some knowledge on this, as this isn't a round I would bother with but again I could be too new to know better one way or the other

Not convinced yet?

Most people that nay say +P+ ammo have either never shot it, or shot very much of it.

Back when I could buy a 50 round box of Winchester 127 +P+ for less than $30, I used to shoot a lot of it. My guns never showed any abnormal wear.

Depending on the gun it is possible to cause abnormal wear but it would have to be a poorly built gun at that.

Read this article. 9mm +P+ Ammo | Welcome To

Do some research. Consider that the 357 Sig and the 9MM essentially use the same barrel.

If you want to shoot it, go for it.

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A 38spl is not a 357 magnum , a 9mm is not a 357 sig . Every firearm / caliber has limitations , so let's respect them .

Okay, so what are those limitations? Do you know? Let's see how well you backup your statement.

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Back when the 9mm was used in the German made Luger...
it was rated at 33,000 CUP and 35,000 PSI, for the way it was designed.

The higher pressure load made, that is known as NATO or +P
was manufactured for the German made Machine guns, that
needed more pressure, to work the action.

A 4" NATO 115gr was rated at 1236fps
A 4" 115gr +P was rated at 1244fps
A 4" 124gr +P was rated at 1204fps.

Nothing to worry about in a weapon in good working order.
One has to remember that one of the 9mm pistols used by the USA, was the Berretta, that was a "Tank".

What are you trying to accomplish with this? In self defense situations bullet speed is not life. Accurate shot placement is. I would much rather have a slower more controllable round for better shot placement than a dragster round that goes all over the place with every trigger pull because I can't control the recoil. Stick with the mainstream standard pressure or +P only.

Kanewpadle , under your title it says , " US Veteran " . Then I shouldn't have to explain / back up anything to you . your military training should have already answered your question !
If it doesn't , then grab a reloading manual / go online and look at the pressures / velocities that a 38spl operates at compared to the 357 magnum . Compare the 9mm to the 357 sig in velocity and pressures . Those figures are printed facts from the powder co's and bullet makers . Not just some internet " dribble " .
You don't have to take my word for it or anyone else's , the printed facts speak for themselves . It sounds like you have already made up your mind to go with it and just wanted others to agree with you . So do what you want , it's your firearm .
I rest my case , I have " backed up " my statements with the necessary information / resources . There is no point in any further discussion . I am done ! Good Luck

Simple solution, just get yourself a good .357 revolver, no need to spray and pray.

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Just a shooter

You haven't stated anything I don't already know. The facts have already proven you wrong. But I knew what you were going to say before you said it.

Explain how numerous police departments around the country have had great success with the Win 127 +P+.

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Life Is A Gift. Defend it!

+P+ per post #15;

I just saw a you tube test with the Winchester 127 +P+ Ranger.
That is the........ +P+ ammo !!

Winchester gives very high fps for its ammo, which sells ammo.
However all of the companies do the same thing.

Any way;
This +P+ ammo out of a G19 with its 4" barrel listed at 1250fps
had an average of only 1198 fps across the chrony used in the gel test.
Ok, lets say 1200 fps.

More than the standard 1150 fps but still a safe loading in weapons in good shape.

One reason a "TRUE" +P+ loading should be looked at closely, before using.