+P ammo

[unclejhim]

Recently purchased a M&Pc 9. The more time I spend with this gun the more I like it. Question I have is can I shoot 124 grn +P JHP with no harm done??
My Berretta Px4 .40 is feeling like a red-headed step child.

 

[Arik]

Yes

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[JimG23]

Since I'm a newbie with the same gun, I was wondering about HPs and +P myself. A LGS by me has some in stock and I was considering buying some but wasn't quite sure because of the "+" symbol before the 9, and what the manual said about it. Thanks for your response Arik.

 

[9cKindaGuy]

I used a few +p bonded hollow points on day one in my new 9c and had no issues, not even a noticeable difference in kick or anything. Too expensive for the range but they load and fire flawlessly!


PuRp'D OuT Tapatalk!

 

[williaty]

One thing to consider: If you're trying to go +P to make up for the shorter barrel, you might be headed in the wrong direction. It's contrary to common sense, but if you read the writings of the people studying handgun ballistics professionally, they universally recommend going to a normal-pressure, heavier weight cartridge as the barrel gets shorter. To simplify the situation immensely, the extra powder in the +P largely gets burnt after the bullet has left the barrel, resulting in a velocity loss (since the burning gasses never had time to push on the bullet). The reduced velocity is a potential problem because the bullet on the +P is designed to properly expand within a velocity window only reached if the full charge is burnt behind the bullet. In contrast, a heavier bullet is slower to accelerate, thus staying in the barrel longer and giving the powder time to combust completely. Additionally, the heavier, normal pressure bullets are designed to expand properly in a lower velocity window, matching them better to the shorter barreled guns.

Basically, if you've got a short 9mm, feed it normal pressure 147gr stuff for defensive use.

 

[Maddmax]

williaty is right. You're just waisting powder in the shorter barrel.

 

[moxie]

Your owners manual says +P is OK, with cautions. See page 11.

+P+ must not be used.