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Military Guns and Ammunition

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This is intended for people interested in the subject of military guns and their ammunition, with emphasis on automatic weapons.

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Elbonia .408 Machine gun(s)   Small Arms <20mm

Started 27-Jan by graylion; 4488 views.
graylion

From: graylion

27-Jan

Elbonia has decided on the .408 CT for machine guns, so the question is now what machine gun to procure. The options considered by the procurement office so far are

  • MG3 adapted to the calibre (somebody fell in love with the dotrine of high ROF)
  • Short recoil MG, similar to LWMMG, scaled up
  • Constant recoil for improved accuracy (might be too heavy)

the latter two options are considered preferable for light/dismounted infantry.

together with some optics (what kind of)?

  • Edited 27 January 2023 5:16  by  graylion
gatnerd

From: gatnerd

27-Jan

Constant recoil would need a receiver like 2' long probably given the length we see for 7.62:

graylion

From: graylion

27-Jan

Is this a problem? What I am wondering about is weight compared to short recoil

EmericD

From: EmericD

27-Jan

graylion said:

Elbonia has decided on the .408 CT for machine guns, so the question is now what machine gun to procure.

You will need a quick change barrel feature for sure, as the .408 CT is perfectly able to make a smooth bore barrel of any rifled tubes with less than 1,000 rounds, in a bolt action rifle.

For MG use, you can probably expect a barrel life around ~500 rds.

In reply toRe: msg 4
Mr. T (MrT4)

From: Mr. T (MrT4)

27-Jan

Light weight version of Kord is the closest you could probably get off the shelf. But Case is closer to a stretched .338LM than 50BMG so custom gun is needed

graylion

From: graylion

27-Jan

EmericD said:

You will need a quick change barrel feature for sure, as the .408 CT is perfectly able to make a smooth bore barrel of any rifled tubes with less than 1,000 rounds, in a bolt action rifle.

Absolutely

Farmplinker

From: Farmplinker

30-Jan

MG3 action, 45x benchrest scope, because it needs a proper optic to take advantage of superior range and accuracy.

In reply toRe: msg 7
graylion

From: graylion

30-Jan

So what is which gun used for?

  • 6.8x51 SAW
  • 10.36x77 HMG for
    • dismounted use
    • distributing around camps
    • mounting for pintle mounts (do we want these at all?)
  • 30x113 for all RWS
    • or do we want a version that is gas powered and mechanical striker for pintle mounting and camps?

renatohm

From: renatohm

31-Jan

If Elbonia was smart enough to cut a deal with France to have you as an advisor (paying you handsomely in the process, of course), what calibre should their medium machine gun use?

You mention 408CT is a barrel burner. Why?

Mr. T (MrT4)

From: Mr. T (MrT4)

31-Jan

If you take your most basic barrel burner excel file, which is a very rudimentary and meant to roughly indicate barrel life for a sporting rifle barrel, not a machine gun 

Given the same powder energy density and pressures, pure bore size to powder burn .408CT would be less of a barrel burner than 50bmg if it used similar bullets and similar pressures but 50bmg is typicaly at lower pressures.

Barrel burner rough comparison bore vs powder charge = barrel burned out

.50BMG   - .510     240gr    =  778rds

.408CT    -  .408      150gr   = 816 rds 

338 LM    - .338   100gr      = 865rds

.338 NM  - .338     90gr      =1069rds

.308Win  -    .308    47gr     =2700rds

.223Rem    -.224     24gr     =2896rds

300BLK      - .308     24gr     =10.365rds   

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