Reducing number of No.4 Barrel grooves to speed production?

[muffett.2008]

Certainly brings back a few memories, I remember straightening a L1A1 barrel using the shadow method and the tow bar of a Landrover, it had been run over, a couple of test rounds and another happy digger.
I tried to save the young blokes from a severe A..Kicking, no one did it for me though when I was in Anti Tank, forgot to secure the front barrel lock on a 106 Recoiless on a Landrover, took off and so did the gun, a slow motion backflip with me trying to stop as I held onto the barrel, being lifted out of the seat.....feet off the pedals, it took only minor damage, knocked the scope a bit, but with a bit of judicious packing and bore sighting, it outshot the other guns on the line the following day.......the Gods really do like me

[CINDERS]

Just asking the forum but has anyone ever witnessed the Ontos (Greek for "Thing") let drive with the splinter rounds I think they look rather awesome but a one salvo rig then hike it out and reload, could they fire all 6 at once or was it not recommended the reason I ask is Bruce talked about his wayward RCL and it jolted my memory of the thing.
(Sorry for the poor patch pic)

[Thunderbox]

4-groove SMLE barrel; apparently from a specific BSA sub-contractor, and AFAIK only found on a limited number of 1942 Dispersals.

[browningautorifle]

4-groove SMLE barrel

First I've seen...

[Bruce_in_Oz]

Once again: NEVER say never.

All we need now is a THREE groove job to get the whole set....................

[browningautorifle]

THREE groove

Made like a Snider...

[CINDERS]

Looks like a thin piece of rubber around the barrel to help dampen the pulse of the barrel!
Did they ever muck around with the Metford style of rifling in the No.4 and No. 1 Mk III's or is the process more involved TIA

[Bruce_in_Oz]

The reason the Metford form was abandoned and replaced by the "deep" Enfield form was the advent of cordite ammo.

Cordite burns at a MUCH higher temperature than the old compressed black powder of the first .303 cartridges. The rather "subtle", 7-groove Metford rifling rapidly became REALLY subtle after a steady diet of cordite-fuelled ammo.

The odd thing is that the Japanese were also keen on the Metford form and cheerfully made a zillion 6.5mm Arisaka barrels in that style: not "shot out", but "Made that way", as it were..........

If you squint up the barrel of a H&K G-3, you will see something similar. "Chordal" / "Metford" rifling is ideally suited to hammer-forging as there are NO sharp edges to shatter on the frighteningly expensive mandrel. The lack of sharp corners is a huge boon when it comes to hard-chroming the bore: no sharp "corners means no excessively high or low current-density areas to cause problems with chrome deposition. Thus you end up with excellent useful life...........and easier cleaning. Such a barrel may not shoot like a Krieger, but it won't cost like one either, and it will certainly last longer on "Rock and Roll"!!

Side Note: "Proper" H&K trigger packs are marked "S", "E", "F": "Safe", "Economy", "FUN"!!

[CINDERS]

Thanks for the reply Bruce.

[Lee Enfield]

4-groove SMLE barrel; apparently from a specific BSA sub-contractor, and AFAIK only found on a limited number of 1942 Dispersals.




https://www.milsurps.com/images/impo...00929975-1.jpg

I have had 4 groove "dispersal" SMLE rifles,

I found a 4 groove Savage manufactured No4 barrel, but unfortunately it's been "sporterized". Really wish I could find a full length one.