Hk121

[KentuckyBuddha]

Lighter machine gun,

made with narrower bullet,

is a dumb idea.





yw Hanka : )

[stanc]

.260 Rem belt-fed?

Bye bye barrel...barrel bye bye.
Bye bye barrel, gunner don't cry..
We chambered in the wind-cheater
The throat paid the price
Your first 30 bursts were beautiful
But now your groups are scheisse
Bye bye barrel, bye bye...

I suppose it'd be considered nitpicking to point out that "price" and "scheisse" don't rhyme... :eek:

[Trooper]

That was the thinking behind the GD-OTS LWMMG (lightweight medium machine gun) in .338 Norma Magnum calibre, which was announced last year. It weighs pretty much the same as the M240, although the ammo is of course heavier. The cartridge is slightly different from the .338 Lapua Magnum sniper round - it is designed to fit in the same gun action s but the case is shorter to allow more room for a longer, heavier bullet.

The .300 Win Mag MK248 Mod 1 used by the US Army is a very high-pressure specialist sniper round which could well give an MG a short barrel life.

Actually they are now using the .300 Win Mag Mk 248 Mod 2 now that is about 200 grain. Even worst.

With the .338 Norma Magnum, does it have a good BC? It makes sense that if we want to keep a GP MG then to move up to a heavier cartridge. Then merge the 5.56 and 7.62 rounds into one 6.5mm GPC

[Trooper]

Lighter machine gun,

made with narrower bullet,

is a dumb idea.





yw Hanka : )

Light MG such as the M249 SAW that fires the 5.56x45? If we replace that with the 6.5mm GPC would that not be better?

[Trooper]

http://www.thefirearmblog.com/blog/2013/...ma-magnum/

Interesting information. 300 gn. bullet

[stanc]

With the .338 Norma Magnum, does it have a good BC? It makes sense that if we want to keep a GP MG then to move up to a heavier cartridge. Then merge the 5.56 and 7.62 rounds into one 6.5mm GPC

If a 6.5mm GPC proves to have sufficiently good performance, a strong case can be made for replacing 5.56 and 7.62 NATO with it.

However, the .338 LWMMG is really a niche weapon, with ammo much too heavy for the MMG/GPMG role, and lacking the range of a .50 HMG and destructive capability of a 40mm GMG. It'd be nice to have for a few dismounted infantry scenarios, and for arming some very lightweight vehicles, but it's poorly suited for general purpose use.

[Tony Williams]

Actually they are now using the .300 Win Mag Mk 248 Mod 2 now that is about 200 grain.

Not that I've heard. The original loading was the MK248 Mod 0 which consisted of a 190 grain SMK fired at 3,000 fps. This was recently replaced by the MK248 Mod 1 which fires a 220 grain SMK at 2,850 fps, which generates an average chamber pressure of 68,100 psi (with a maximum north of 70,000).

[Tony Williams]

However, the .338 LWMMG is really a niche weapon, with ammo much too heavy for the MMG/GPMG role, and lacking the range of a .50 HMG and destructive capability of a 40mm GMG. It'd be nice to have for a few dismounted infantry scenarios, and for arming some very lightweight vehicles, but it's poorly suited for general purpose use.

Actually the trajectory out to 1,500 metres is said to be pretty much the same as the .50 BMG ball (special sniper loadings of the .50 with low-drag bullets can beat this easily, of course, but they don't fire those from MGs) so I suspect that the effective range isn't that different, in terms of accuracy and dispersion. The hitting power is a lot less, though, of course, and it's too small to have bullets like the MK211 SAPHEI.

[stanc]

http://www.thefirearmblog.com/blog/2013/...chine-gun/

[video=youtube;YvPTT7gKoJs]http://www.youtube.com/watch?v=YvPTT7gKoJs[/video]
http://www.youtube.com/watch?v=YvPTT7gKoJs