9x20

9x20

9x20 or 9mm Browning long was used for Pistol m/07 and submachine gun m/37. The cartridge was created by Browning for there new pistol Browning m/03. The pistol was made under license by Husquarna as Pistol m/07, and there is were the ammunition is mainly used. The submachine gun m/37 were only used for a couple of years, before it was outdated and changed for 9x19 models instead. The 9x20 cartridge is a bit weaker than the 9x19 ammunition, but it is no bigger difference.

The cartridge is found in four generations in the Swedish defense:

First we used ammunition made in Belgium, by FN. This was for the first couple of years, before the production could start in Sweden.

Then we started out the manufacturing ourselves in Sweden after the almost the same spec as the FN made round. Im not sure, but im convinced that the cartridge differs in powder and primer. One other difference of course, is the head stamps. The oldest cases i have found with Swedish head stamps is from 1910.

There were extensive attempts during the 40th to gain better precision of the m/07 gun through changes of the bore of the gun and change the bullets form and diameter. A change of the bore gave to big stress to the gun, whereupon a change to the projectile was done instead. Ammunition manufactured after 1947 has much better precision than older ammunition. The testing showed that the bores dimensions in comparison to the projectiles diameter are of great importance. The best results in precision is not with brand new barrels, but with used barrels were the bore diameter is increased with 0,01-0,02 mm.

In the 60th or 70th (i don't know yet), finally, there was a change to non corrosive primers. The boxes is easily recognized as modern.

The pistol m/07 and ammunition became obsolete 1996, after almost 90 years in service.

The ammo boxes may be found in many forms and labels. The only thing in common is that they are packed for 28 rounds in 4 rows. 4x7 rounds makes 4 filled mags for the m/07 pistol. Se some pics here

Calibre 9x20

Model 9mm Sk Ptr m/07

Projectile form Ball

Projectile weight 7,2 Gram

Projectile material Jacket of copper nickel plated brass. Led core

Projectile type

Colour markings

V0 mps

V0 fps

Propellant

Propellant weight Gram

Propellant weight Grain

This is the early FN Belgium made ammunition. It can be found in som different fachion with or without the blue around the primer. Im not sure about the difference between the FN made and the Swedish made cartridges, but i guess it is mostly about the primer and the gun powder.
The cartridge is manufactured somewere between ca 1903-1910

Calibre 9x20

Model 9mm Sk Ptr M/07

Projectile form Ball

Projectile weight 7,2 Gram

Projectile weight Grain 111 grain

Projectile material Jacket of copper nickel plated brass. Led core

Projectile type Ball

Colour markings -

V0 mps 305 mps

V0 fps 1000 fps

Propellant

Propellant weight

Ammunition produced before 1947.

Calibre 9x20

Model 9mm Sk Ptr M/07

Projectile form Ball

Projectile weight Gram 7,2 gram

Projectile weight Grain 111 grain

Projectile material Jacket of tombac plated mild steel. Led core

Projectile type Ball

Colour markings Purple around case neck and primer.

V0 mps 345mps

V0 fps 1131 fps

Propellant Pkr II

Propellant weight Gram 0,33 gram

Propellant weight Grain 5,09 grain

Ammunition produced 1947 or later.

Calibre 9x20

Model

Projectile form Ball

Projectile weight -

Projectile material -

Projectile type Inert round

Colour markings -

V0 -

Propellant -

Propellant weight -

This is a early inert round, made by FN, Belgium

Calibre 9x20

Model

Projectile form Ogival

Projectile weight

Projectile material

Projectile type Inert round.

Colour markings -

V0

Propellant

Propellant weight

This is the late, Swedish made inert round with the classic "grooves" in the case.
A big thanks to John Giles, California for this picture!