22/45 Fan":26yx4wd9 said:
Note that the NATO pressure spec is somewhat higher than standard pressure but not as high as +P.
Well, when I mentioned that I ordered this ammo in another forum, someone told me that this was NATO ammo, and he thought that all NATO ammo was +P. The thread went for some 24 posts, and no one disputed what he said about NATO being +P, so I have been going by that.
It has this description:
This is Winchester Ranger 9mm NATO Mil-Spec. 124gr. FMJ Ammo. This ammo was manufactured for a military contract. We got some of the left over inventory when the contract was over. This ammo is manufactured to U.S. and NATO Military Spec's. It is headstamped WCC with the NATO Cross. This is the best 9mm Available at this time. It comes in 50rd. boxes, 500rds. per case.
I just looked, but this is ammo no longer available, so all I have is the photo and description from the other forum.
I just googled “Ammo Pressures” and came up with this.
http://en.wikipedia.org/wiki/Overpressure_ammunition
This is one line from that link:
“The +P+ designation is not currently used by the SAAMI, but is used by some manufacturers to designate loads that exceed the +P SAAMI specification. One source lists the 9x19 mm +P+ loading as having a pressure of 42,000 psi, and 18% increase over the standard pressure of 35,000 psi, and the .38 Special +P+ as 22,000, a 29% increase over the standard pressure”.
This corroborates what I was told in another forum. This is all new to me, and interesting, and I want to learn about the different loadings and understand them.
Part of all of this comes from ordering the NATO ammo to shoot thru my Marlin Camp 9. After ordering, I found out that I can not shoot +P ammo thru the carbine, but I did not know to ask about NATO ammo and my Camp 9, so I wonder if anyone here might have that gun, and knows if NATO ammo can be shot in the Camp 9?
I did come up with this, but not sure it was a reliable source.
Pressure specs for 9mm (max):
Standard pressure: 37,400 psi
+P: 38,500 psi
+P+: 40,000 psi
NATO: 42,000 psi
"Proof loads": 49,800 psi
Only standard pressure and +P are manufactured to SAAMI specs.