Hit_Factor
Member
I carry a Glock 17 with WW 9mmP 115gr JHP +p+ loads. Since 1989.
Probably time to shoot that stuff and buy a new box
I carry a Glock 17 with WW 9mmP 115gr JHP +p+ loads. Since 1989.
I'll bet the paper targets are impressed. I don't know how smart it is to hot load a necked down .40 S&W to beyond +P levels especially for a Gock. The Sig and the .40 are already +P'd out.
9mm can safely handle very high pressures, higher than the .40 and Sig because the case is stronger.
Thanks for the info, but that site is blocked at my current location.I'm attaching two reports from workshops held by an ammo manufacturer (Speer/Federal) for several police agencies in 2008 and 2007 in Colorado and Montana. In the tests 9mm, 357 Sig, 40 S&W, 45acp and .223 ammo was fired into or through several media (auto glass, sheet rock, etc.) and into ballistic gel.
The results are instructive and give a good look at some of the characteristics of modern ammo. You also see an indicator of the different performance of the rounds used.
Ft. Collins, Colorado 2007
http://ammo.ar15.com/project/Self_D...dBallisticsWorkshops/Ft_CollinsPoliceDpmt.pdf
Butte, Montana 2008
http://ammo.ar15.com/project/Self_Defense_Ammo_FAQ/FedWoundBallisticsWorkshops/Butte_WBW_5_27_09.pdf
tipoc
It's the base that's important not the neck. Found this picture that shows 9mm vs 40, but couldn't find 357 Sig:
Please forgive my ignorance, but why is that?
Standard 9mm is spec'd at 35000psi, +p is 38500, and +P+ is 40000psi, or at least according to the engineer at Speer I talked to.Max Pressure for .357= 40,000 psi
(http://en.wikipedia.org/wiki/.357_SIG)
Max Pressure for .40= 35,000 psi
(http://en.wikipedia.org/wiki/.40_S&W)
Max Pressure for 9mm= 34,084 psi
(http://en.wikipedia.org/wiki/9×19mm_Parabellum)
I think its probably more of a necked down 10mm. What happens when you neck down a .40 to 357SIG, the case will come up 3-4 thousandths short.As I understand it, .357 Sig is not just a necked 40. I was told that the .357 cases are little thicker than the .40 to account for the bottleneck(?) and/or increased pressure. It is my understanding that you can get into some serious "ka-boom" territory if you try to neck a .40 to .357 Sig.
I encourage anyone on here to set me straight, though. I would be very interested in learning more about this stuff.
Thanks for the info, but that site is blocked at my current location.
Can anyone Summarize it real quick?
The G17 is 23 years old, but the ammo is two years old!Probably time to shoot that stuff and buy a new box
The G17 is 34 years old, but the ammo is two years old!
My mistake - I got my G17 in 1989. That makes it 23 years.Wow.
How'd you get one that was made in 1978? (2012 - 34 = 1978)
They weren't made 'til 1980 and weren't imported in to the US until 1986.