Has anybody fired said rounds in the 365?
I was wondering if limited use is going to cause any damage to the gun.
By limited use would just be a few for test and a mag full for carry.

It was discussed here in a thread recently. Several members, including myself, have put +p+ through our P365s with zero issues.

+p+ typically doesn't damage a gun, it accelerates wear. The P365 is +p rated so +p+ shouldn't be an issue. Now I wouldn't want to shoot thousands of it exclusively but shooting some should be fine.

Check out this thread.

https://sigforum.com/eve/forums...0601935/m/6600088274

I hear a lot about +P+ but is there a real designation for a +P+? Mostly a bunch of Huie?

quote:

Originally posted by ACP1:
I hear a lot about +P+ but is there a real designation for a +P+? Mostly a bunch of Huie?

+P is a SAAMI spec round. It's overpressure from the standard load, but to a known level. All +P+ means is it's not a SAAMI spec but still overpressure round round.

Federal 9BLE, Danny Vermin's favorite, "it shoots through schools"

I see no point. The risk of over penetration, IMO, outweighs ant perceived increase in effectiveness.

SAAMI specifications indicate what the maximum permissible pressure is for a particular cartridge. There is nothing that requires a manufacturer to load to that max pressure. And because +P+ isn’t a SAAMI specification for any cartridge, when a manufacturer designates a load as being +P+ it can mean anything—or nothing.

I tested a batch of Federal 124 grain Hydra-Shok that was rated as +P+ and its average velocity from a P229 was 1109 fps. From the same gun Winchester 124 grain NATO (Q4318) averaged 1130 fps, and Speer 124 grain +P Gold Dot averaged 1206 fps.

Federal +P+ 115 grain BPLE is hot, averaging 1245 fps in my testing from a P225, but not close to Winchester 115 grain Ranger SXT +P+ at ~1320 fps from the same length barrel (P229).

As for “overpenetration,” nothing overpenetrates like a bullet that misses its target. In law enforcement shootings that’s typically 80% or more of the shots fired. Even if the target is hit, how do we know that the bullet will stop there? If we must depend upon a bullet’s stopping in the target to ensure it doesn’t hit something we must not hit, we shouldn’t be shooting at all.

IMHO no point risking it and going against manufacturer recommendation that would also void warranty. Plenty of high performing +P loads including Federal HST and Speer Gold Dot.

quote:

Originally posted by Fredward:
I see no point. The risk of over penetration, IMO, outweighs ant perceived increase in effectiveness.

If I recall correctly, one of the criticisms of BPLE vs more modern loads, is somewhat less penetration, not more.

Thank you, Sigfreund, for those numbers.

quote:

Originally posted by sigfreund:
If we must depend upon a bullet’s stopping in the target to ensure it doesn’t hit something we must not hit, we shouldn’t be shooting at all.

That bears repeating.

For shooting +P rounds from a short barrel, there's considerable waste of the capability of the round. To take advantage of +P+ cartridges, for those cases where there may be an advantage, a longer barrel is preferred. Enough is lost from a short barrel that little benefit is gained, and the additional noise and flash may make the choice counterproductive.

Load the round up with additional powder, and much of it will be burning outside the barrel, contributing little or nothing to velocity or energy.

Speer offers the a gold dot product in a "short barrel" version which will certainly be better than firing +P+ out of a P365.

+p+ might be better suited to a 9mm carbine, at that point I would probably opt for the NATO round.
If I did not feel comfortable about a bullet performing at "normal" 9mm loading's, and thought I needed +P or +P+ I would probably start looking at a larger caliber round like a .40

quote:

That bears repeating

About the only time I reach for +P+...

I have a SIG 365, and I see no need to shoot +P or +P+ in in it. It is usually loaded with standard pressure Federal HST 124 grain or 115 grain 9BP loads

+P+ is not a SAAMI spec. Sig only warranties their guns for use with SAAMI spec ammo, so if the warranty is important to you, I wouldn't do it for that reason alone (about 1/4 of the way down the page: https://www.sigsauer.com/support/faqs/).

Will shooting a few mags of boutique +p+ ammo through the gun break it? Probably not. But I'd question why you'd want to do that when there are plenty of quality SAAMI options out there. Ultimately, it's your gun, your money, and your body parts...you can do what you want. But the manufacturer recommends against it (and not just in the 365).

FWIW: When JHP ammunition had questionable expansion/penetration reliability with less than 1100 fps velocity, it was understandable to up the velocity using +P and +P+ pressure loads. A lot of progress has occurred since those days in the 1970's and '80's, and if you check out the performance of modern defensive loads offered by Federal, Winchester, Remington, and Speer, you can see that the issues have been well addressed. I see no reason to use high pressure loads, when standard velocity rounds offered by these companies provide the necessary expansion and penetration qualities needed with less wear and tear on the owner's defensive arm.

I don't like to push any of my guns to the limit. If I feel the need for more power, I go up in caliber in a different gun.

My carry guns include 9mm, .357 magnum, .40 S&W, 10mm, .45 ACP, .45 Colt, .44 magnum, and .454 Casull. I carry a government model 1911 in either .45 ACP or 10mm most of the time.

Your hand is more likely to give up first than the gun.