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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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For Your Amusement   General Army topics

Started 15/9/21 by stancrist; 15340 views.
dskellogg

From: dskellogg

6-Aug

Please just let us know when you're taking pre-orders for TFW, 2nd edition.

mpopenker

From: mpopenker

7-Aug

schnuersi said:

So you say the XM5 is worse than the old battle rifles or the FG42?

I've never shot an FG-42 or XM5, and the closest thing that I fired in bursts was the AK-308, but I expect the recoil of the XM5 to be more brisk and sharp, and thus less comfortable to the shooter, especially without the thick clothing and/or body armor

autogun

From: autogun

7-Aug

EmericD said:

That also highlight the benefits of the .276 Pedersen, which was 25% lighter (with less recoil) than the .30-06 M2, while delivering the same amount of energy at medium & long range... a truly missed opportunity.

Emeric, do you happen to know how the BCs of the .276 Pedersen compared with the .303 Mk VII (flat based) and Mk XIII (boat tailed)?

autogun

From: autogun

7-Aug

dskellogg said:

Please just let us know when you're taking pre-orders for TFW, 2nd edition.

It will be a while yet.... with Autocannon now launched I am working on the compilations of my various presentations and articles, suitably updated. Next will come TFW for which I have already done a lot more research. 

EmericD

From: EmericD

7-Aug

autogun said:

Emeric, do you happen to know how the BCs of the .276 Pedersen compared with the .303 Mk VII (flat based) and Mk XIII (boat tailed)?

Hi Tony,

According to the data found in Jochem's book, the BC of the .303 Mk VII was around 0.211 (G7) in the supersonic domain, and 0.265 (G7) for the MkVIII.

The BC found in Hatcher's book for the .276 Pedersen was 0.247 (G2) which is equivalent to... 0.247 (G7) between 0 and 800 m, when launched at 820 m/s.

By the way, the current 6.8x51 mm Training Practice proposed by SIG (.475 G1 or 0.242 G7 between 0 and 800 m when launched from the XM5 at 808 m/s) is the ballistic twin of the .276 Pedersen when fired from the .276 Garand.

EDIT : and the .276 Garand is reported to have only half the recoil energy of the .30-06 Garand.

  • Edited 07 August 2022 6:23  by  EmericD
autogun

From: autogun

7-Aug

Thanks Emeric, that's very interesting. The Pedersen may not have been a perfect general-purpose small-arms cartridge, but was seemingly better than anything else around at the time.

It's an obvious choice for the revised TFW. Of course, there were no talented gun designers in the UK in the mid-1930s, but the best approach would be to give FN and CZ detailed specifications plus large quantities of .276 ammo, and see what they came up with.

mpopenker

From: mpopenker

7-Aug

autogun said:

but the best approach would be to give FN and CZ detailed specifications plus large quantities of .276 ammo, and see what they came up with

Anything you outsource to Belgians or Czechs will be automatically available to Germans by 1940, if not earlier. Including machinery, complete drawings etc. Especially Czech.

stancrist

From: stancrist

7-Aug

autogun said:

...the best approach would be to give FN and CZ detailed specifications plus large quantities of .276 ammo, and see what they came up with.

Is there some reason to think that that either FN or CZ would have done anything other than adapt their latest designs to fire .276 Pedersen?

  • Edited 07 August 2022 12:57  by  stancrist
autogun

From: autogun

7-Aug

mpopenker said:

Anything you outsource to Belgians or Czechs will be automatically available to Germans by 1940, if not earlier. Including machinery, complete drawings etc. Especially Czech.

Apart from the drawings being in imperial measurements.... wink

This applied historically, with the Bren and Besa MGs, but the Germans didn't copy them. And I can't see the Germans abandoning 7.92 x 57 to use the .276 Pedersen.

autogun

From: autogun

7-Aug

stancrist said:

Is there some reason to think that that either FN or CZ would have done anything other than adapt their latest designs to fire .276 Pedersen?

Weight requirements in the specifications?

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