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Old September 1st, 2013, 08:17 PM   #1
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Default 9mm 9mm +P and +P+ ???

Reading through a reference manual for a M&P 9c and it talks about using standard 9mm luger and +p ammo and it states that +p+ ammo is not allowed.

Have any of you used +P+ in any of your 9mm handguns, any ever use it in a M&P 9c

I was at Gander tonight, and wanted to know what +P ammo you have used and what you suggest.

Did you have any cycling problems with +P or +P+

Did you have to get a stronger recoil spring

etc etc etc.
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Old September 2nd, 2013, 12:13 AM   #2
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No gun company will tell you that +p+ is ok, because there is no standard for +p+.
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Old September 2nd, 2013, 07:10 AM   #3
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Speer gold dot +p+ in my sig 226, factory spring, thousands of rounds, no problems to note
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Old September 2nd, 2013, 07:30 AM   #4
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I read and understand the operation manual,

And I am happy to get some real world experience from a couple of you guys.

I intend to shoot the most cost effective rounds, ball ammo that I can with the wife to get her to draw point shoot in less than two seconds, repetition, repetition, repetition.

I want to shoot a very few hot rounds and load with good hollow points for one magazine full.

Do you guys believe there is enough difference to go from +P to +P+ I can not find any quick foot pounds of energy charts to show the +P+ out of a M&P 9C if it is 1 foot pound I do not think it is worth a failure to feed.

????
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Old September 2nd, 2013, 07:39 AM   #5
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Found this chart

http://www.ballistics101.com/9mm.php


Looks like +P+ will out perform standard .40 cal

good to know, now need to find out if the pistol will hold together.
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Old September 2nd, 2013, 07:50 AM   #6
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I would run the Speer gold dot +p, I'm not even sure if you can even buy the +p+ as it used to be restricted sales
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Old September 2nd, 2013, 08:30 AM   #7
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Used some .38 Spl +P years ago - then decided if I wanted "more" to just use .357s for about the same $.

If you want "more" out of 9mm - .40 S&W...
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Old September 2nd, 2013, 04:26 PM   #8
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Quote:
Originally Posted by dougstephvoor View Post
Reading through a reference manual for a M&P 9c and it talks about using standard 9mm luger and +p ammo and it states that +p+ ammo is not allowed.

Have any of you used +P+ in any of your 9mm handguns, any ever use it in a M&P 9c

I was at Gander tonight, and wanted to know what +P ammo you have used and what you suggest.

Did you have any cycling problems with +P or +P+

Did you have to get a stronger recoil spring

etc etc etc.
I think you answered your own question.

Don't waste your time. You'll never find a Meijer or Walmart selling it...
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Old September 2nd, 2013, 08:15 PM   #9
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Overpressure_ammunition Overpressure_ammunition
Quote:
In the United States, standards related to arms and ammunition are maintained and published by the Sporting Arms and Ammunition Manufacturers' Institute (SAAMI), which publishes standard internal pressures of calibers, formerly measured in copper units of pressure and currently in psi based on piezoelectric instrumentation. Official +P pressures are established by the SAAMI for certain cartridges; in general the +P pressure is approximately 10% higher than the standard pressure (see chart below). SAAMI does not have a +P+ pressure standard, but this indicates a pressure higher than the +P loading. In both cases this is below the pressure of proof test cartridge, which all firearms are required to withstand before they may be sold. Proof pressure are established by the SAAMI, as a percentage of the working pressure, so this places an upper bound on the +P+ pressures of 30–40%.[4] By way of comparison, magnum calibers may be loaded to nearly twice the pressure of the rounds from which they were derived. Overpressure rounds are commonly defensive rounds and are loaded by police and others in need of maximum power in a compact firearm. Accordingly, most overpressure rounds are hollow points or other types of expanding ammunition.

"Higher pressure" is not the same as "high pressure"; +P cartridges are generally loaded to pressures far below those typically found in magnum cartridges. The +P standard is designed so that if a shooter was to accidentally use a +P cartridge in a non-+P-rated firearm, the chance of a one-time explosive failure is minimal as long as the gun was in good physical condition. Repeated firing of +P ammunition in a gun not rated for it will drastically speed mechanical failure of the gun, however, and so it should only be used in firearms designated by the manufacturer as safe for +P use.
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Old September 4th, 2013, 08:10 PM   #10
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This is a great explanation
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Old September 6th, 2013, 06:58 PM   #11
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I bought some spears gold dot +P 124 and those things really have some additional pop to them . My wife is still comfortable shooting them. We both like them.
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Old September 7th, 2013, 08:25 AM   #12
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Quote:
Originally Posted by dougstephvoor View Post
I bought some spears gold dot +P 124 and those things really have some additional pop to them . My wife is still comfortable shooting them. We both like them.
Great rounds, good choice
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Old September 7th, 2013, 09:06 AM   #13
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I got some +P++PP-P+=P. man that shit is awesome! It leaves a rainbow vapor trail and shit!
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Old September 7th, 2013, 03:38 PM   #14
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A guy at the club shoots major power with 9mm. I hate it when his brass gets mixed in with mine the primer pockets get stretched and the sizing die gets stuck on the case.
I know the load has to be on the edge of too much. It shoots great and it the only 9mm that puts a spin on the bowling pins.
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Old September 8th, 2013, 04:37 PM   #15
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I got some +P++PP-P+=P. man that shit is awesome! It leaves a rainbow vapor trail and shit!
I want you to know that even though you have a -p that you can still suckseed.
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Old September 26th, 2013, 02:11 AM   #16
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Great rounds, good choice
X's 2 that's what I have for my M&P-9
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