Author Topic: 9mm Major powder  (Read 581 times)

0 Members and 1 Guest are viewing this topic.

Slacker

  • Sharpshooter
  • **
  • Posts: 21
  • A-99611
9mm Major powder
« on: November 18, 2017, 08:24:27 AM »
I have been loading 9mm Major for a few years now. I have always used WAC (Winny Autocomp) or Hodggy HS-6.
Both powders were originally designed for shotgun use. As such, they produce a lot of gas compared to other pistol powders. The gas lets the comp run efficiently.
The downside is that in order to make major PF, I had to load a good bit over book max.
In 9mm Major barrels, the weak point is always the brass. The barrels are typically proofed to 49,000 PSI or above.
Because of the brass, I have always sorted by head stamp. I use only FC and Blazer head stamps.
(FYI, they are the same brass, just a different head stamp)

Always looking for a better mousetrap, I recently bought 4lbs of VV 3N38.
It is a very slow pistol powder (or a fast rifle powder) depending on how you look at it.
It may work well in a locked breach Pistol caliber carbine with a 16" + bbl.
I'd not use it in a semi auto blow back though.

My conclusion is that I am now a VV convert. At book MINIMUM, it makes major with a 124gr!

It shoots flatter than anything else I have tried. The recoil impulse is softer than I expected.
SD is typical of VV powder (lower than I required). This winter, I will chrony the load that I worked up at 90 degrees.
I'm expecting very little change, but never say never.

Take away message, if your shooting a compensated pistol, give VV 3N38 a try.
Good stuff!

Next reloading project:

9mm Major Steel challenge load.
90gr JHP (380acp) bullet over a massive charge of VV 3N38.
I'm looking for a 2000FPS pancake flat load from my 5.2" Czeckmate barrel.
I bet it feels like shooting a 22 LR MKIII.
I hope to get some video of a few stages once I get the kinks worked out.

« Last Edit: November 18, 2017, 08:31:14 AM by Slacker »
Native son of Maine living in the land of Catfish and cornbread.

Jamiethesquid

  • Administrator
  • High Master
  • *****
  • Posts: 1,464
  • A75759
Re: 9mm Major powder
« Reply #1 on: December 04, 2017, 05:40:04 PM »
Boy do I have to pick your brain about loads for my CZ P-09 Open gun Build

Sent from my XT1650 using Tapatalk

2015 will be my best year yet! Rocking the CZ!!!

Slacker

  • Sharpshooter
  • **
  • Posts: 21
  • A-99611
Re: 9mm Major powder
« Reply #2 on: December 05, 2017, 05:39:15 AM »
Boy do I have to pick your brain about loads for my CZ P-09 Open gun Build

Sent from my XT1650 using Tapatalk

Glad to share any knowledge I have.
Pm me.
Native son of Maine living in the land of Catfish and cornbread.

Slacker

  • Sharpshooter
  • **
  • Posts: 21
  • A-99611
Re: 9mm Major powder
« Reply #3 on: December 09, 2017, 06:07:48 AM »
Boy do I have to pick your brain about loads for my CZ P-09 Open gun Build

Sent from my XT1650 using Tapatalk

Is the P-09 factory barrel rated for major?
Will it have a comp?

The CZ chambers are typically cut very short for a 9mm. You may want to check it out before diving in. You can always easily ream it deeper if need be.
« Last Edit: December 09, 2017, 06:10:28 AM by Slacker »
Native son of Maine living in the land of Catfish and cornbread.

Jamiethesquid

  • Administrator
  • High Master
  • *****
  • Posts: 1,464
  • A75759
Re: 9mm Major powder
« Reply #4 on: December 11, 2017, 08:17:38 PM »
I will be running a comp, and the P-09 barrel I can run a RN Xtreme out to about 1.190"

Sent from my XT1650 using Tapatalk

2015 will be my best year yet! Rocking the CZ!!!

Slacker

  • Sharpshooter
  • **
  • Posts: 21
  • A-99611
Re: 9mm Major powder
« Reply #5 on: December 18, 2017, 05:40:07 PM »
I will be running a comp, and the P-09 barrel I can run a RN Xtreme out to about 1.190"

Sent from my XT1650 using Tapatalk

I'd try to avoid plated bullets in 9mm major.
A medium to heavy crimp is needed and the plated stuff does not like it. Neither does coated.
Native son of Maine living in the land of Catfish and cornbread.

Jamiethesquid

  • Administrator
  • High Master
  • *****
  • Posts: 1,464
  • A75759
Re: 9mm Major powder
« Reply #6 on: December 23, 2017, 09:10:03 AM »
Good info, thanks

Sent from my XT1650 using Tapatalk

2015 will be my best year yet! Rocking the CZ!!!