CM9 +p+

[aferguson27]

I know I've read where a cm9 will handle +p ammo but I was wondering if a cm9 would handle +p+?

[jocko]

kahrs says not to. so my qeustion to those wanting to do so is why??? buy a 40 cal if u want more ump..

+P is the norm is seems for 9mm but in 40 cal, u donn't see +P40, for the round is already a hot round...

so willa kahr shoot +P+ in 9mm, IMO sure it will:amflag:

[olympicmotorcars]

My understanding about +p+ is they are outside of sammi specs and could be over pressure. You just will not know exactly what you are buying, and I do not know of any manufacturer that authorizes their use. You should really be careful with this type of ammo.

[Ikeo74]

My understanding about +p+ is they are outside of sammi specs and could be over pressure. You just will not know exactly what you are buying, and I do not know of any manufacturer that authorizes their use. You should really be careful with this type of ammo.
Could be over pressure?

+P is over pressure thats is why the first + is there.

+P+ is over pressure PLUS even more PRESSURE, thus the Last (+)

Anyone using +P+ in any make subcompact handgun is asking for trouble. :eek:

[aferguson27]

I know I bought some underwood 115gr +p jhp and seen the +p+ and was wondering about it.

[JustinN]

I don't think any manufacturer approves +p+ and like has been stated, is out of spec. The +p has a rating and known pressure load, the +p+ means "we ignored that and went higher. How much higher? I guess you'll find out"

[aferguson27]

I just ordered the +p 115gr and was just wondering about the +p+. Like jocko said I'll just stick with my 40.

[muggsy]

It's not that it's out of spec, but rather that there is no spec for +P+. It kinda like a box of chocolates, you never know what you're going to get.

[jocko]

I wouold not shoot +P+ due to the unknown, but would a kahr take thatround. IMO it would take that round as good as any utter gun out there, but that doesn't mean you willget a second shot after either. I really think that is why the 40 cal made it debut, we 9mm guys got bored and wanted more, most fotays are the same size as the makers 9's so now u haver a safer choice. U could steip up to a almighty 45 which is bigger than a dump trucke and slower than a dump truck and hav ethe best of no worlds achievements..

Just kiddin, U all know I luv 45's. I am gonna count up all I got and report back. If ellen degenerate can come out of the closet and get away with it, certanly ol jocko can walk out of the closed with 45's hanging all over him and finally get the respect due to him. Just sayin

[JimC]

Not a CM9 but my PM9 has exactly (?) 24 rds. of Win. 127 gr. +P+ T-series JHP (RA9TA) thru it.

Most were to run some chrono data but a few were to see how accurate they were in my PM9.

Accuracy at the "normal" combat distances was as good as any other load.

I can't lay my hands on the chrono data right now but as I recall, they weren't all that impressive for a +P+ loading, not much more if any better than a good +P load.

Follow up shots in double taps were controllable. Recoil doesn't bother me in the PM9, I use my +P EDC load to qualify.

Did the testing of this ammo in my PM9 harm or damage it in anyway, not that I could determine. It still runs 100%.

Does this mean that I carry this +P+ load in my PM9, no it doesn't.

[jocko]

alot of it is also adhype. Lets say saami for+P is 1500 fps velocity, and I load 1510 fps. that is outside the saami standards for+P, so I can now call it+

P+and the difference which most who have tested it and chrono-ed it is negligeable Kahr says NO, so I would honor that.If they said OK,I wouldstillnotbe out there buying it, It ain't cheap ammo andwithno realstandards, not sur ehow much liabilioty the ammo maker would have either. Buy a fotay.

[JimC]

From my post in the ammunition forum from 8/2012.

FWIW, last year I ran some of the Win. Ranger #RA9TA 127 gr. +P+ over my chronograph thru my PM9.

When compared to the Speer Gold Dot #23611 124 gr. +P HP short barrel load, I found the +P+ loading to be lacking in velocity from the PM9 3.1" bbl.

It seems that the 127 gr +P+ actually looses velocity in the 3.1" bbl.

Gold Dot 124 gr. +P HP SB load.

1116.6 fps average for 6 rds.
1121.2 fps average for 6 rds.

Speer lists the velocity of this load at 1150 fps out of a 3.5" bbl.

Winchester Ranger 127 gr. +P+ HP load.

1117.4 fps average for 6 rds.

IMO, there is no advantage in using the Win. +P+ loads in the 3.1" bbl. of the PM9 even though it did shoot very well thru my pistol at normal combat distances. It did however, not shoot any better than the Speer load which is my EDC load.

As I recall I fired a total of 24 rds. so I'm not concerned about accelerated wear on my PM9.

[Ikeo74]

From my post in the ammunition forum from 8/2012.

FWIW, last year I ran some of the Win. Ranger #RA9TA 127 gr. +P+ over my chronograph thru my PM9.

When compared to the Speer Gold Dot #23611 124 gr. +P HP short barrel load, I found the +P+ loading to be lacking in velocity from the PM9 3.1" bbl.

It seems that the 127 gr +P+ actually looses velocity in the 3.1" bbl.

Gold Dot 124 gr. +P HP SB load.

1116.6 fps average for 6 rds.
1121.2 fps average for 6 rds.

Speer lists the velocity of this load at 1150 fps out of a 3.5" bbl.

Winchester Ranger 127 gr. +P+ HP load.

1117.4 fps average for 6 rds.

IMO, there is no advantage in using the Win. +P+ loads in the 3.1" bbl. of the PM9 even though it did shoot very well thru my pistol at normal combat distances. It did however, not shoot any better than the Speer load which is my EDC load.

As I recall I fired a total of 24 rds. so I'm not concerned about accelerated wear on my PM9.
One thing to remember about +P+ ammo. The disigination of +P+ has "NO" relationship with/to velosity. The "P" in +P+ stands for Pressure, plus pressure plus. Are you getting more velosity with more pressure, maybe, but not necessilary. In an older gun, more pressure may cause a blow-up. Even in new guns you might get a detonation, a blown primmer or a split case or a buldged barrel. The negitive effects outweigh any benefit from +P+ ammo. Use at your own risk.

[JimC]

One thing to remember about +P+ ammo. The disigination of +P+ has "NO" relationship with/to velosity. The "P" in +P+ stands for Pressure, plus pressure plus. Are you getting more velosity with more pressure, maybe, but not necessilary. In an older gun, more pressure may cause a blow-up. Even in new guns you might get a detonation, a blown primmer or a split case or a buldged barrel. The negitive effects outweigh any benefit from +P+ ammo. Use at your own risk.

Well, yes and no. I've chronoed the samer +P+ ammo in a standard G17 barrel and it was faster in that barrel compared to similar +P loadings from the same manufacturers. The same holds true to a certain degree when using a SIG P226.

And as I said, " Does this mean that I carry this +P+ load in my PM9, no it doesn't."

You said, "The negitive effects outweigh any benefit from +P+ ammo." and I tend to agree. I think that was my point but maybe I wasn't quite clear. :rolleyes:

[Ikeo74]

Well, yes and no. I've chronoed the samer +P+ ammo in a standard G17 barrel and it was faster in that barrel compared to similar +P loadings from the same manufacturers. The same holds true to a certain degree when using a SIG P226.

And as I said, " Does this mean that I carry this +P+ load in my PM9, no it doesn't."

You said, "The negitive effects outweigh any benefit from +P+ ammo." and I tend to agree. I think that was my point but maybe I wasn't quite clear. :rolleyes:
JimC, You were clear to me. I only used your post as a quote because it was the only one to reference velosity to the +P+ load. I didn't want other readers to think there was a great benefit from extra pressure. Your information was very good. I didn't mean to offend you or anyone else. Thanks, Ikeo

[JimC]

JimC, You were clear to me. I only used your post as a quote because it was the only one to reference velosity to the +P+ load. I didn't want other readers to think there was a great benefit from extra pressure. Your information was very good. I didn't mean to offend you or anyone else. Thanks, Ikeo

No offense taken, honestly. ;)