Smith & Wesson Forum

Go Back   Smith & Wesson Forum > >


Reply
 
Thread Tools Display Modes
  #1  
Old 01-29-2017, 12:44 PM
Codinqueen's Avatar
Codinqueen Codinqueen is offline
Member
+P +P +P +P +P  
Join Date: Jul 2016
Location: Fla Panhandle
Posts: 10
Likes: 1
Liked 3 Times in 1 Post
Default +P

I keep hearing about some ammo that has +P. What is +P ?


Thanks in advance.
Reply With Quote
  #2  
Old 01-29-2017, 12:48 PM
NYlakesider's Avatar
NYlakesider NYlakesider is offline
Member
+P +P +P +P +P  
Join Date: Apr 2012
Location: Northern NY-AdirondackMts
Posts: 3,271
Likes: 3,407
Liked 3,567 Times in 1,568 Posts
Default

Quote:
Originally Posted by Codinqueen View Post
I keep hearing about some ammo that has +P. What is +P ?


Thanks in advance.
It is loaded hotter (faster and more hit power) than standard ammo in that caliber. Only use in guns that are rated as +P. It should say right on the gun. If in doubt do not use it!
__________________
14 S&W Revs none with locks!
Reply With Quote
  #3  
Old 01-29-2017, 12:49 PM
Codinqueen's Avatar
Codinqueen Codinqueen is offline
Member
+P +P +P +P +P  
Join Date: Jul 2016
Location: Fla Panhandle
Posts: 10
Likes: 1
Liked 3 Times in 1 Post
Default

Got it, thanks for the quick reply.
Reply With Quote
  #4  
Old 01-29-2017, 12:51 PM
cjwils cjwils is offline
Member
+P +P +P +P +P  
Join Date: Oct 2010
Location: Northwest US
Posts: 102
Likes: 1
Liked 20 Times in 15 Posts
Default

I believe +P is shorthand for High Pressure.
Reply With Quote
The Following User Likes This Post:
  #5  
Old 01-29-2017, 12:52 PM
427mach1's Avatar
427mach1 427mach1 is offline
Member
+P +P +P +P +P  
Join Date: Jun 2010
Location: Georgia
Posts: 1,441
Likes: 661
Liked 1,548 Times in 498 Posts
Default

SAAMI, the Sporting Arms and Ammunition Manufacturing Institute, determines the maximum average pressure allowed for each caliber of commercial ammunition. They have specified a +P rating which exceeds their normal rating for a limited number of calibers. For example, 9mm is rated at 35,000 psi whereas the +P is rated at 38,500 psi. This allows a slightly higher muzzle velocity but you must make sure your firearm is capable of handling this additional pressure.
Reply With Quote
The Following 4 Users Like Post:
  #6  
Old 01-29-2017, 01:25 PM
Nevada Ed's Avatar
Nevada Ed Nevada Ed is online now
Member
+P +P +P +P +P  
Join Date: Nov 2012
Location: Reno Nv
Posts: 5,633
Likes: 157
Liked 2,842 Times in 1,509 Posts
Default

Oh;
I thought it stood for,
+ more Powder or
more people to hold the gun.

Sorry.
Reply With Quote
  #7  
Old 01-29-2017, 01:58 PM
Targets Guy's Avatar
Targets Guy Targets Guy is offline
US Veteran
+P +P +P +P +P  
Join Date: Jul 2013
Location: Southwest Iowa
Posts: 3,968
Likes: 757
Liked 6,219 Times in 1,746 Posts
Default

don't confuse with +P+
__________________
Mike
S&WCA #3065
Reply With Quote
  #8  
Old 01-29-2017, 02:40 PM
427mach1's Avatar
427mach1 427mach1 is offline
Member
+P +P +P +P +P  
Join Date: Jun 2010
Location: Georgia
Posts: 1,441
Likes: 661
Liked 1,548 Times in 498 Posts
Default

Quote:
Originally Posted by Targets Guy View Post
don't confuse with +P+
There actually is no SAAMI standard for +P+, that is something the ammo manufacturers came up with on their own. It simply means that the ammo has pressures that exceed the +P rating. Use at your own discretion!
Reply With Quote
The Following 2 Users Like Post:
  #9  
Old 01-29-2017, 02:44 PM
reddog81 reddog81 is online now
Member
+P +P +P +P +P  
Join Date: Sep 2014
Location: IA
Posts: 527
Likes: 92
Liked 356 Times in 212 Posts
Default

There's lots of info out there about +P, much more than could be covered in a single post. Like others have said it means a high pressure than the cartridges standard pressure.

Most quality modern guns can handle +P loads but it is prudent to research a specific firearm if you aren't sure. Most guns do not indicate whether or not +P is acceptable unless you comb through the manual and even then it's not necessarily there. I own half a dozen different 9mm's and 38 specials and none of them have +P stamped anywhere on them.
Reply With Quote
  #10  
Old 01-29-2017, 05:52 PM
DWalt's Avatar
DWalt DWalt is offline
Member
+P +P +P +P +P  
Join Date: Dec 2009
Location: South Texas
Posts: 17,739
Likes: 2
Liked 8,581 Times in 5,005 Posts
Default

I have never seen or heard of any gun being marked as +P. Unless yours is very old, there is no safety hazard in shooting +P ammunition occasionally, but it may put more stress on the gun and shorten its useful life. In most cases, there is NEVER a good reason for feeding any gun a steady diet of +P loads. As previously noted, there is also a +P+ load, but SAAMI does not recognize it in their chamber pressure standards. It is defined only as being greater than +P.
Reply With Quote
The Following User Likes This Post:
  #11  
Old 01-29-2017, 06:00 PM
Ziggy2525 Ziggy2525 is offline
Member
+P +P +P +P +P  
Join Date: Jan 2016
Location: Nebraska
Posts: 58
Likes: 18
Liked 53 Times in 19 Posts
Default

Quote:
Originally Posted by DWalt View Post
I have never seen or heard of any gun being marked as +P.
...
Both of my S&W 642's are marked +P on the barrel.
Reply With Quote
The Following 4 Users Like Post:
  #12  
Old 01-29-2017, 06:14 PM
NYlakesider's Avatar
NYlakesider NYlakesider is offline
Member
+P +P +P +P +P  
Join Date: Apr 2012
Location: Northern NY-AdirondackMts
Posts: 3,271
Likes: 3,407
Liked 3,567 Times in 1,568 Posts
Default

Quote:
Originally Posted by DWalt View Post
I have never seen or heard of any gun being marked as +P. Unless yours is very old, there is no safety hazard in shooting +P ammunition occasionally, but it may put more stress on the gun and shorten its useful life. In most cases, there is NEVER a good reason for feeding any gun a steady diet of +P loads. As previously noted, there is also a +P+ load, but SAAMI does not recognize it in their chamber pressure standards. It is defined only as being greater than +P.
My 642 and my Ruger LCR.38 are so marked. I have also seen other guns (models) at the dealer that are marked +P.
__________________
14 S&W Revs none with locks!
Reply With Quote
The Following User Likes This Post:
  #13  
Old 01-30-2017, 05:16 AM
ArchAngelCD's Avatar
ArchAngelCD ArchAngelCD is offline
Member
+P +P +P +P +P  
Join Date: Dec 2006
Location: Northeast PA, USA
Posts: 5,034
Likes: 247
Liked 1,517 Times in 937 Posts
Default

+P = Plus Pressure

Like said above, +P ammo is loaded to slightly higher pressures than standard ammo. IMO it's more of a marketing scheme than anything else. There is no good reason to charge so much more for a few more grains of powder but they do.
__________________
Freedom is never free!!

Last edited by ArchAngelCD; 01-31-2017 at 11:41 AM. Reason: Autocorrect got me again!
Reply With Quote
  #14  
Old 01-30-2017, 09:03 AM
cmansguns cmansguns is offline
US Veteran
+P +P +P +P +P  
Join Date: Mar 2016
Location: Hanover, Virginia
Posts: 218
Likes: 250
Liked 414 Times in 130 Posts
Default

My 637-2 has +P roll stamped right on the bbl after 38 S & W Spl.

My Model 60 no dash does not have any +P mark at the same place on the barrel.

I shoot +P only occasionally in the 637-2 but not at all in the M60.
Attached Thumbnails
+P-s-w-637-4-jpg   +P-model-60-jpg  
__________________
Charlie B
SWCA Member # 3083
Reply With Quote
  #15  
Old 01-31-2017, 11:29 AM
ArchAngelCD's Avatar
ArchAngelCD ArchAngelCD is offline
Member
+P +P +P +P +P  
Join Date: Dec 2006
Location: Northeast PA, USA
Posts: 5,034
Likes: 247
Liked 1,517 Times in 937 Posts
Default

Quote:
Originally Posted by cmansguns View Post
My 637-2 has +P roll stamped right on the bbl after 38 S & W Spl.

My Model 60 no dash does not have any +P mark at the same place on the barrel.

I shoot +P only occasionally in the 637-2 but not at all in the M60.
I'm not telling you to do anything I'm just asking questions.

Do you really think an Aluminum alloy frame revolver is stronger that an all steel frame revolver?

Is it possible to stamp a barrel +P before the standard was created? That would be like having a coin dated 100 BC, how would they know?

S&W has stated any of their all steel revolvers with a model number (post 1957) is safe to shoot +P ammo. IMO your M60 is better suited to shoot the +P stuff than your M637, not that commercial .38 Special +P ammo is that stout.
__________________
Freedom is never free!!
Reply With Quote
The Following User Likes This Post:
  #16  
Old 02-03-2017, 11:49 PM
Racer X Racer X is offline
Member
+P +P +P +P +P  
Join Date: Aug 2009
Location: Seattle
Posts: 465
Likes: 11
Liked 78 Times in 50 Posts
Default

FWIW, in 9mm, +P 124 JHP is roughly the same power as a NATO spec round, but the NATO is a FMJ.

Generally, in an alloy pistol, +P rounds are OK for occasional use to verify function and accuracy, and safe as a carry round. Some will put a higher poundage recoil spring to cut down on frame battering.
Reply With Quote
  #17  
Old 02-04-2017, 12:25 AM
shouldazagged shouldazagged is offline
Member
+P +P +P +P +P  
Join Date: Feb 2013
Location: Louisville, KY, USA
Posts: 15,804
Likes: 28,743
Liked 28,469 Times in 9,048 Posts
Default

Quote:
Originally Posted by DWalt View Post
I have never seen or heard of any gun being marked as +P. Unless yours is very old, there is no safety hazard in shooting +P ammunition occasionally, but it may put more stress on the gun and shorten its useful life. In most cases, there is NEVER a good reason for feeding any gun a steady diet of +P loads. As previously noted, there is also a +P+ load, but SAAMI does not recognize it in their chamber pressure standards. It is defined only as being greater than +P.
My early (1990) 640 no-dash .38 Special is one about 5,000 with CEN prefix serial numbers that are factory-etched "TESTED FOR +P+", inside the cylinder window. Several other members here own them.

I haven't the slightest interest in firing +P+ in mine, nor do I see any need for that power level in .38 Special. Get a .357 Magnum.
__________________
Got an Irish wax. Don't ask.
Reply With Quote
The Following 3 Users Like Post:
  #18  
Old 02-04-2017, 01:06 AM
Targets Guy's Avatar
Targets Guy Targets Guy is offline
US Veteran
+P +P +P +P +P  
Join Date: Jul 2013
Location: Southwest Iowa
Posts: 3,968
Likes: 757
Liked 6,219 Times in 1,746 Posts
Default

Quote:
Originally Posted by DWalt View Post
I have never seen or heard of any gun being marked as +P. Unless yours is very old, there is no safety hazard in shooting +P ammunition occasionally, but it may put more stress on the gun and shorten its useful life. In most cases, there is NEVER a good reason for feeding any gun a steady diet of +P loads. As previously noted, there is also a +P+ load, but SAAMI does not recognize it in their chamber pressure standards. It is defined only as being greater than +P.
My 638-3 has it stamped on the barrel.

image hosting
__________________
Mike
S&WCA #3065
Reply With Quote
  #19  
Old 02-04-2017, 03:44 AM
rwsmith's Avatar
rwsmith rwsmith is online now
Member
+P +P +P +P +P  
Join Date: Dec 2012
Location: (outside) Charleston, SC
Posts: 19,881
Likes: 23,152
Liked 15,290 Times in 7,803 Posts
Default Older guns..

plus P came into being in the (I think) mid 70s. Older guns won't have the plus P marked on the barrel. Not to worry. S&W says that any steel gun new enough to have a model number will take plus P.
__________________
"He was kinda funny lookin'"
Reply With Quote
  #20  
Old 02-04-2017, 05:28 AM
ParadiseRoad's Avatar
ParadiseRoad ParadiseRoad is offline
Member
+P +P +P +P +P  
Join Date: Dec 2008
Location: Colorado
Posts: 1,872
Likes: 4,822
Liked 25,433 Times in 5,368 Posts
Default

__________________
don't try this at home, kids
Reply With Quote
The Following 4 Users Like Post:
  #21  
Old 02-04-2017, 10:19 AM
Gamecock's Avatar
Gamecock Gamecock is online now
Member
+P +P +P +P +P  
Join Date: Jan 2010
Location: SC
Posts: 1,800
Likes: 263
Liked 1,652 Times in 754 Posts
Default

Codinqueen, just because a gun is marked +P doesn't mean you have to shoot +P ammo in it. I shoot standard .38 Special in my 642. +P ammo is no fun.
__________________
If it ain't Baroque, fix it.
Reply With Quote
The Following 2 Users Like Post:
  #22  
Old 02-04-2017, 07:43 PM
Steve912 Steve912 is offline
Member
+P +P +P +P +P  
Join Date: Apr 2016
Posts: 611
Likes: 608
Liked 460 Times in 266 Posts
Default

It's nice that some handguns are marked as +P capable, but doesn't seem to be common practice. Read the manual to see what mfr says about +P ammunition. Manuals are available free for download, either from mfr's website or online repositories.

Every pistol I've owned has been +P capable. None were marked to that effect--Colt, S&W, Ruger, Walther, AMT, Glock--but the manuals gave the information.

I did own a Diamondback DB9, which had no markings prohibiting +P--but the manual explicitly stated the gun was not designed to handle +P. I know someone who's DB9 'violently deconstructed' from one round of +P.
Reply With Quote
The Following User Likes This Post:
  #23  
Old 03-01-2017, 09:49 PM
mrmike7189's Avatar
mrmike7189 mrmike7189 is offline
Member
+P +P +P +P +P  
Join Date: Aug 2010
Location: massachusetts
Posts: 173
Likes: 50
Liked 43 Times in 30 Posts
Default 9mm+P

Pdx1 124 grain 9mm +p 1200 fps
Attached Thumbnails
+P-pdx1-9mm-jpg  
__________________
M&P380 Ruger P944DAO ,Glock26
Reply With Quote
  #24  
Old 03-01-2017, 10:10 PM
okiegtrider's Avatar
okiegtrider okiegtrider is online now
Member
+P +P +P +P +P  
Join Date: Jan 2015
Location: Oklahoma
Posts: 1,290
Likes: 1,560
Liked 2,019 Times in 667 Posts
Default

Then there is the +P+ monkey wrench...

__________________
America First
Reply With Quote
The Following User Likes This Post:
  #25  
Old 03-01-2017, 11:39 PM
ParadiseRoad's Avatar
ParadiseRoad ParadiseRoad is offline
Member
+P +P +P +P +P  
Join Date: Dec 2008
Location: Colorado
Posts: 1,872
Likes: 4,822
Liked 25,433 Times in 5,368 Posts
Default

...+P...

__________________
don't try this at home, kids
Reply With Quote
  #26  
Old 03-01-2017, 11:45 PM
shouldazagged shouldazagged is offline
Member
+P +P +P +P +P  
Join Date: Feb 2013
Location: Louisville, KY, USA
Posts: 15,804
Likes: 28,743
Liked 28,469 Times in 9,048 Posts
Default

Quote:
Originally Posted by okiegtrider View Post
Then there is the +P+ monkey wrench...
I've carried one every day for seventeen years. Never with +P+ though. No interest in that. See my post above.
__________________
Got an Irish wax. Don't ask.
Reply With Quote
  #27  
Old 03-02-2017, 12:33 AM
rwsmith's Avatar
rwsmith rwsmith is online now
Member
+P +P +P +P +P  
Join Date: Dec 2012
Location: (outside) Charleston, SC
Posts: 19,881
Likes: 23,152
Liked 15,290 Times in 7,803 Posts
Default Older funs won't have it....

Quote:
Originally Posted by DWalt View Post
I have never seen or heard of any gun being marked as +P. Unless yours is very old, there is no safety hazard in shooting +P ammunition occasionally, but it may put more stress on the gun and shorten its useful life. In most cases, there is NEVER a good reason for feeding any gun a steady diet of +P loads. As previously noted, there is also a +P+ load, but SAAMI does not recognize it in their chamber pressure standards. It is defined only as being greater than +P.
Older S&Ws won't have the +P on the barrel. This question comes up a LOT. It's smarter just to stamp it rather have people in doubt for 40 years. (+P has been around since around the mid 70's)

Smith says that any ALL STEEL gun with a model number can shoot +P ammo. This MAY NOT MEAN that it should be fired all the time with +P because it will increase the rate of wear. In other words, instead of a J frame Smith lasting for about 30,000 rounds, you will only get around 28,000 if you shoot continuous +P loads.,

Now some guns, like small and light, ALLOY framed guns will shake loose quicker with a steady diet of +P rounds. Which I can relate to because continuous +P through an alloy j frame gun makes ME shake loose a lot faster.
__________________
"He was kinda funny lookin'"

Last edited by rwsmith; 03-02-2017 at 12:35 AM.
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
Forum Jump

Powered by vBadvanced CMPS v3.2.3
smith-wessonforum.com tested by Norton Internet Security smith-wessonforum.com tested by McAfee Internet Security

All times are GMT -4. The time now is 10:27 PM.


S-W Forum, LLC 2000-2015
Smith-WessonForum.com is not affiliated with Smith & Wesson Holding Corporation (NASDAQ Global Select: SWHC)