9 mm single action pistols okay with +P+?

[STORMINORMAN]

Picking up a nice leo (police surplus) GLOCK 22 or 23, or a M&P 40 (1.0) allows one to obtain a 357 SIG conversion barrel and all that implies... The magazines for the S&W are even conveniently marked "40 S&W .357".

Add a 9mm conversion barrel and some 9mm magazines and one has the best of THREE worlds: cheap 9mm for practice, 40 S&W and the ability to fire .357 SIG as appropriate.

Cheers!

P.S. As far as point of aim/impact between just ANY two different factory loadings goes, it is always a salient question to be answered: it depends. Actually, that's a very good reason for adjustable sights.

With the possible exception of the occasional dedicated ammunition pairings, i.e., Winchester's "Train & Defend" lines, Federal's "Practice and Defend Combo Packs" and their like, it is up to the shooter to determine what to practice with and what to carry or have loaded in the nightstand...

Federal also offers a "Train + Protect" JHP line that supposedly is both adequate and "affordable". Well, "more affordable"...?

Reloading makes this much easier should one wish to develop practice loads that approximate the performance of their self defense ammo, whether from the factory or home made.

For the typical so-called "enthusiast" who hits the range twice a year and shoots a "Green" or "White" Box it's a pretty moot point.

 

[WR Moore]

OK, the .40 S&W was developed to be able to fit in 9 mm scale frames. My SAAMI charts are two floors down, but IIRC, .40 & 9+P run very similar pressures. The engineers play with slide weight, recoil spring tension and dwell time of slide & barrel lockup to keep recoil forces in the same ball park.

You can do price comparisons online on your own.

Generally, changing the bullet from non expanding to expanding of the same weight doesn't significantly change point of impact. Depending upon what critters you might run into, neither 9 mm nor .40 S&W might be an optimal choice. I personally found I shoot a 9 mm better than a .40. A lead firearms instructor for a large suburban department near DC found that to be true for pretty much the entire force. They changed back to 9 mm.

 

[WR Moore]

MPa is a MEGAPASCAL, or one million Pascal, and is the international standard for measuring the peak pressure in a firearm. Thus 265MPa is 265 megapascal.

OK, I previously tried without much success to convert from MPa to PSI. What's 265 MPa in PSI? Color me curious.

 

[LVSteve]

1 MPa = 145 PSI.

 

[WR Moore]

Thanks, that makes the NATO absolute max 38,425 psi. Gee, that looks a lot like SAAMI max. But that does include a different method of measuring chamber pressure so not apples to apples.

 

[LVSteve]

Thanks, that makes the NATO absolute max 38,425 psi. Gee, that looks a lot like SAAMI max. But that does include a different method of measuring chamber pressure so not apples to apples.

The latest M1152 115 gr offering for the army runs at 39,700 PSI. Runs over 1320 fps from a 4.5" barrel.

 

[Bill Lear]

My title is inaccurately short. While I'm pretty sure a M1911 nine mm will handle +P+ reliably as the most durable of the striker nines, I'm interested in an exposed hammer single action nine with a grip length of a Browning Hi-Power. Again, I do not refer to girth or width, but about a magazine well that is designed for 9 x 19 mm cartridge length.

So no stipulations other than shorter magazine well and magazine, single action, and being capable of heavy use of +P+. Has something of this nature been in production in this century?
***
A few adjunctive questions.
- What are normal OEM ammunition pressures for standard nine, +P nine, and +P+ nine?

- What is expected ballistic improvement between standard nine and ?

- What is expected ballistic improvement between +P nine and +P+ nine?

- Where on the pressure-performance graph are the military surplus ammunitions that occasionally are available?

This sounds like a question one would find on Quora.
I do not think the OP wants an answer, just wants to see who will jump through the hoops.