8mm blanks ??

[Tom 312]

Dose anybody know the force that a 8mm blank bullet subjects the barral to ?

 

[AlexanderA]

Some 8mm blanks (German army issue, for example) used light, hollow wooden bullets. Are those the ones you're referring to? The purpose was for use in machine guns without the need for feedway spacers. But they still needed blank firing adapters, to function the guns and to shred the wooden bullets.

If you fire a wooden-bulleted blank without a shredder, you better be sure there's nobody / nothing you want to destroy in front of you. The issue is not the barrel being subjected to force (it isn't) but the fact that you're actually shooting a projectile.

 

[indy1919a4]

Dose anybody know the force that a 8mm blank bullet subjects the barral to ?

It would depend on the blank being used. I.E a Rifle grenade launching blank would be pretty stout and depends on the nation making it.

 

[ojh]

According to CIP, maximum pressure of the 8 mm Blanc cartridge is 450 bar.
Compared with bullet firing ammo, that's very low.
For example, for 45ACP Pmax = 1300 bar and for 9mm Pmax = 2350 bar.

 

[AlexanderA]

The pressure of a blank depends on the blank adapter (bore restrictor) that is placed on the barrel. If the barrel is completely unrestricted, the pressure is negligible. (We're talking here about standard report blanks. Grenade-launching blanks would be a different story.)

 

[ojh]

CIP also defines the "bore diameter" for 8 mm Blanc to be 4.3 millimeters. I suppose that's the standardized size for the vent hole.