+P Rounds ''Safe'' to use? - Page 2 - MP-Pistol Forum

+P Rounds ''Safe'' to use?

This is a discussion on +P Rounds ''Safe'' to use? within the MP Reference forums, part of the Smith & Wesson MP Forum category; Originally Posted by arthury Sure, there may be a lesser risk with +P but they are clear about premature wear and tear. Now, why would ...


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Old October 14th, 2011, 04:38 AM   #16
 
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Originally Posted by arthury View Post
Sure, there may be a lesser risk with +P but they are clear about premature wear and tear. Now, why would you want to do that to your M&P?
Because if I'm using my +P rounds for what I carry them for, I don't care if my M&P needs to be serviced... at least I'll be alive.
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Old October 14th, 2011, 10:00 PM   #17
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9mm +p is completely safe in these modern pistols and causes little if any additional wear. ToddG and friends put over 62,000 rounds of +p through a bone stock M&P9 with almost no maintenance and only had a few hiccups. If you take a little time to clean and lubricate your weapon about every 1000 rounds or so, including scheduled replacement parts every 10-15,000 rounds, your M&P should last much longer than that.



As far as premature wear, one of the last 5 shots groups through ToddG's M&P (below) scored a 1.50" group at 25 yards, centered about 1 1/2" from POA. As you can see 3 of those 5 shots fell easily within 1/2" of each other.



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Old October 15th, 2011, 05:40 PM   #18
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Originally Posted by RJ_Whitlock View Post
I searched the forums and couldn't find anything about it. I use my M&P as a carry weapon for now (I would love to get into competition shooting, I just don't know where to begin to look in my state of Minnesota.) I only use the +P rounds when I'm carrying. When I'm at the range, it's 115 gr Winchester white box all day. My question is will the Winchester PDX1 124 gr JHP +P be fine in my weapon? As in no serious damage, blown out barrel or things of that nature?. I don't want my EDC to fail when I need it the most lol.



Thanks for all the help!


Come join us on the MN forums! Minnesota link

What part of the state do you live in?



Plenty of shooting clubs around here from April thru October.

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Old October 19th, 2011, 12:41 PM   #19
 
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I don't know why anyone would care to feed their M&P a steady diet of +P at the range, but for carry ammo, why wouldn't you?

I shoot 115gr all the time, but I carry PDX 124gr. I shoot a couple now and then just to cycle my ammo inventory. They shoot great.
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Old December 25th, 2011, 09:40 AM   #20
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In my opinion after thorough study the +P ammo should be fine in the M&P as it was made for "M&P" service. I would not recommend a steady dose all the time. Use low cost ammo like WWB at range at .30 cents a round instead of $1 to $1.50 a round on defense ammo. One thing I do occasionally is mix a magazine with defense ammo and range ammo alternating them. This way you can compare POA with both and get the feel of both during the same firing round. Save the defense ammo for the BG which I hope I never have to use! I keep Hornady Critical Defense or Winchester Ranger fully loaded in one mag at all times. Just my two cents.
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Old December 25th, 2011, 10:36 PM   #21
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Originally Posted by bzuber56 View Post
... $1 to $1.50 a round on defense ammo...
You're paying too much. Both Gold Dot and HST are available in 50 round boxes for less than $30. That means $0.60 or less per round for first run premium SD ammo, arguably the best ammo around.
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Old December 26th, 2011, 11:40 AM   #22
 
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Quote:
Originally Posted by bzuber56 View Post
In my opinion after thorough study the +P ammo should be fine in the M&P as it was made for "M&P" service. I would not recommend a steady dose all the time. Use low cost ammo like WWB at range at .30 cents a round


Or better yet, federal champion for even less



*swyped from the evo so excuse any typos*
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Old March 11th, 2013, 02:50 PM   #23
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Sucks you are not supposed to run +p+ ammo. My favorite 9 load is sxt t series 127 gr +p+. It was the issue ammo when we were issued 5906s.
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Old March 11th, 2013, 04:10 PM   #24
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Originally Posted by arthury View Post
I am not too sure about this. The last time I looked at any S&W M&P manual, all of them warned about using P+ or +P+ or any non-compliant SAMMI ammo.

I have also written to S&W and they were very clear about it: DO NOT USE it.
I don't understand your continued confusion, but have no problem with you avoiding +p ammo, that's your decision to make. Your letter to S&W may have asked either a 40S&W/357Sig specific or an ambiguous question, if that's actually the answer you received.

For those of us with a better understanding of modern firearms, S&W says it's fine to use SAAMI compliant 9mm +p and 45ACP +p ammo in our M&P pistols. On the other hand, S&W is not going to recommend 40S&W +p and 357Sig +p since there are no +p SAAMI pressure specifications for them, just as there are no +p+ SAAMI pressure specifications in any caliber.


The older manual is a little inelegant on this, until you understand what they are trying to say, since it's intended to cover more than one caliber of firearm. Once you understand the line the manual is trying to walk, you'll realize the +p is good to go in 9mm and 45 ACP since there is a SAAMI +p specification for both of them, but 40S&W +p and 357Sig +p are outside of SAAMI pressure and "may affect the wear characteristics" of your pistol.

Recent/current manuals are much clearer on this subject, S&W (at 1-800-331-0852) will be happy to send you one if you request it.

Quote:
Originally Posted by East bay operator View Post
Sucks you are not supposed to run +p+ ammo. My favorite 9 load is sxt t series 127 gr +p+. It was the issue ammo when we were issued 5906s.
That's still the issued ammo at depts. that also issue M&P pistols.
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Old April 15th, 2013, 06:09 PM   #25
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+1 KRWeiss
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Old April 16th, 2013, 07:01 AM   #26
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I'm glad +P is OK because I've been using it for a good long while now. The gun still looks and shoots like always. There is the normal amount of wear on the slide rails. In the hands of someone who can see straight, it is very accurate. I usually hit the target.
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Old July 25th, 2013, 10:28 AM   #27
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I have my M&P 9mm loaded with Speer Gold Dot LE 124 grain +P, as my "carry load", and I have no fear that my M&P will blow up should I fire a few of these rounds.
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Old July 26th, 2013, 05:55 PM   #28
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Originally Posted by East bay operator View Post
Sucks you are not supposed to run +p+ ammo. My favorite 9 load is sxt t series 127 gr +p+. It was the issue ammo when we were issued 5906s.
Smith is just saying this to cover their rear ends. You can design and test a gun to be safe with standard 9mm and +P 9mm because these are well defined by SAAMI.

You can not make a gun that is definitely safe for all +P+ ammo because there is no official definition on what the max pressure for +P+ is. Basically, the ammo manufacturer can make it as hot as they feel like as long as they can fit enough of whatever propellant they choose into the case.
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