Where is there 9mm +P Data?

[Rule3]

OK, hold on.

Yes, 9mm is a high pressure round and I do not normally even load max loads of any caliber, as for paper shooting it does not matter.

But lots of factory ammo is sold as +P and none of my manuals have any data, nor have I found it online at the powder companies.

Real Guns has some data but were it came from or how it was derived (pressure) I have no idea.

The printed +P for 38 Special appears to just be the Max regular loads.

So any manuals have any data for the 9mm +P so we can come close to their factory loads??

 

[rcmodel]

No.

But you can nearly match +P 9mm velocity with careful powder selection without needing +P pressure to do it.

rc

 

[Otto]

Speer's Gold Dot 9mm +P factory ammo is a 124gr bullet with a velocity of 1220 fps.
That would be fairly easy to replicate with a slow powder, consult your reloading manual.

Just depends on your definition of +P. I personally consider anything with a PF of 150 or above +P.

 

[CZ9shooter]

I assume the manuals dont list +P data because it may be perceived as unsafe to load an already (relatively) high pressure cartridge even higher. Following that line of thinking, .38 +P is often listed because it is among the lowest pressure rounds in common.

And I agree with others. Use powders at the lower end of suitable burn rates. You should get satisfactory results with charges near, at, or even slightly above max, if you're feeling adventurous. Take my advise with a grain of salt, but the slower powders tend to be more forgiving than the faster burning ones.

 

[zxcvbob]

http://www.lapua.com/en/products/reloading/vihtavuori-reloading-data/relodata/6/34

Check out the data using N350 and 3N38 powders. For example, 147 grain bullet at 1200+ fps from a 4" barrel.

 

[Rule3]

Not that it's "+P" but Hornady lists for the 124gr XTP a max of 5.7 for Power Pistol.

Alliant list for the 124GD a max of 6.4 grs. To me, a big difference for the same weigh bullet.

I can measure velocity with a Chrono but not pressure,

It gets expensive shooting factory +P just to get the velocity and then load up some similar bullets. Can't go by what the factory says on the box as they do not even mention the length of the test barrel or gun used.

 

[CZ9shooter]

Not that it's "+P" but Hornady lists for the 124gr XTP a max of 5.7 for Power Pistol.

Alliant list for the 124GD a max of 6.4 grs. To me, a big difference for the same weigh bullet.

XTP data usually has the bullet seated quite deep. Gold Dots are generally seated to a more conservative OAL.

 

[Hondo 60]

Well SAAMI 9mm +P pressure max is 38,500 PSI (NOT CUP).
So look at 9mm data, & see if the max is up around 38,500.

Just checked Hodgdon.com.
They don't show any data for anything over 33,700 PSI.

 

[gamestalker]

Published data using Longshot, along with Gold Dots, XTP's and Nosler JHP's have all served me well so far.

GS

 

[Edarnold]

http://www.lapua.com/en/products/reloading/vihtavuori-reloading-data/relodata/6/34

Check out the data using N350 and 3N38 powders. For example, 147 grain bullet at 1200+ fps from a 4" barrel.

Beware! The data I've seen in the Lapua tables is based on an overall length of 1.142", which is the maximum OAL for the cartridge. I've loaded 5.9gr of N340 behind the 115gr XTP for about 1300fps with no pressure indications. But, my pistol will accept this cartridge length. If your pistol has a short leade and needs to push this bullet in 0.10" or more to chamber, your pressures are going to be way higher. The lack of a modern chambering spec for the cartridge is why factory, and most loading manual ballistics are so weak.

 

[1SOW]

SAAMI refers to +P as relating to PRESSURE, not bullet speed.: 38,500 CIP

 

[zxcvbob]

I'm pretty sure the maximum length is 1.169". I routinely load 135 grain round nosed bullets to 1.15" OAL.

 

[Potatohead]

yea. I hope it's not 1.142