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7.62X54R Conversion

Printed From: Enfield-Rifles.com
Category: Enfields
Forum Name: Enfield Gunsmithing
Forum Description: Submit any how-to's or other gunsmithing suggestions here.
URL: http://www.enfield-rifles.com/forum_posts.asp?TID=8684
Printed Date: September 25 2018 at 11:09am
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Topic: 7.62X54R Conversion
Posted By: mp44collector
Subject: 7.62X54R Conversion
Date Posted: January 10 2018 at 7:40pm
Anyone here have or know of any Enfield's that have been Chambered in 7.62X54R? Thanks



Replies:
Posted By: Pukka Bundook
Date Posted: January 12 2018 at 6:22am
I don't think these were re-chambered were they?


Posted By: mp44collector
Date Posted: January 12 2018 at 4:31pm
              I know Russia Had some British Enfield's even before WWII, think some were sent in the lend lease agreements also during WWII But there were Not referred to as .303 British they made there own Ammo called 7.7MM X?? (can't remember the Rest) I had a couple thousand rounds of this as a Kid. It burned clean and was accurate ammo but it wore out a Barrel on a No1 Mk4, Steel ammo can be hard on a Barrel.

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Shawn Cusack
indmech@hotmail.com


Posted By: A square 10
Date Posted: January 12 2018 at 7:41pm
7.7x57 IIRC , no never heard of that conversion , why would anyone want to ? bore would be loose on the bullet 


Posted By: mp44collector
Date Posted: January 13 2018 at 2:29am
The caliber is 7.7 x56R that I was talking about, which is a metric version on a .303 British round and if my memory is correct the 7.7mm Jap round measures the same as the .303


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Shawn Cusack
indmech@hotmail.com


Posted By: Pukka Bundook
Date Posted: January 13 2018 at 6:47am
A Square,
 
No, bullet would be fine.
The Russian 7.62 x 54 uses exactly the same dia. bullet as the .303.  (.310 to .312")


Posted By: Shamu
Date Posted: January 13 2018 at 9:12am
"7.7×56mmR" is just the metric nomenclature description of .303 British, the actual cartridge is identical.


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Don't shoot till you see the whites of their thighs. (Unofficial motto of the Royal Air Force)


Posted By: englishman_ca
Date Posted: January 13 2018 at 9:31am
As I understand, (internet folk law here, only something that I read, I have never done it) the 303 can be modified to shoot 7.62 x 54R simply by running a reamer into the chamber. 

Problem is that the fire formed cartridge will have TWO shoulders. Not a problem if you are not reloading and intend to toss the brass.

However, I do know for a fact that the 303 chambered barrel can be modified properly by setting back two threads and cutting a new chamber.


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Look to your front, mark your target when it comes!


Posted By: A square 10
Date Posted: January 13 2018 at 9:45am
sorry , mixed my 3006 and 303 lenths up , is the russian case the same as the 303 ? just tryin to learn something here , 


Posted By: Pukka Bundook
Date Posted: January 13 2018 at 8:47pm
A Square,
 
Russian case is a shade shorter, but would likely work.


Posted By: A square 10
Date Posted: January 13 2018 at 10:32pm
ah - nice to know , i had not thought they were similar except in nomenclature , but then it makes sense as everyone was exchanging info back then , the brits and the japs were quite close in development of bayonets which baffels given the japs advanced sword development and yet ...never mind ive wandered off topic way too far , 

thank you for the education , 



Posted By: mp44collector
Date Posted: January 14 2018 at 4:27pm
It Has been Done, But I keep hearing about Chamber Pressures being much higher in the 7.62x54R I myself would like to Have a Enfield in 7.62x54R and have had a New Barrel Made in this Caliber for my Mk1 No4, But then it comes back to Pressure I keep getting shut down on anyone installing it because they say the receiver and bolt won't accept the pressure. I have Actually been trying to see if some one would make a New bolt and Receiver in 4140 steel But No one is Interested. But I will Keep Hunting.

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Shawn Cusack
indmech@hotmail.com


Posted By: Honkytonk
Date Posted: January 15 2018 at 3:38pm
Just a quick internet look... That Russian round looks like it would be about 8000 psi above max Enfield pressure. Pretty much a shoulder held pipe bomb! Let me know when you have it built, I'll get my wife to fire the first round!!


Posted By: Pukka Bundook
Date Posted: January 15 2018 at 3:54pm
What Is the pressure of the Russian round?
Or put another way, how does it compare to the 7,62  X 51 /.308" round?
 
 


Posted By: Honkytonk
Date Posted: January 15 2018 at 3:59pm
Russian one looks like max 56,000 psi and change, Enfield 48,000 and 308 60,000 psi. These are quick looks on the internet.


Posted By: Honkytonk
Date Posted: January 15 2018 at 4:11pm
I must be wrong on those numbers. Enfields were converted (new barrels) to accept the NATO 7.62x51. Am I missing something? Was anything in the receiver beefed up?


Posted By: Honkytonk
Date Posted: January 15 2018 at 6:33pm
Did a little more on line research. And please help me out here as I'm in way over my head. It looks like, at least on the L42, aside from changing the barrel, they added a 19 ton bolt head. And of course a different mag.


Posted By: Zed
Date Posted: January 16 2018 at 4:24am
The L42 and L39's where proofed at 19 tons for the 7.62 NATO round; hence the 19T stamp.
Although the bolt and head is actually the same as the .303 (it's the extracter claw that's different)
Remember that the 7.62 NATO is a lower pressure than the civilian .308. The difference in velocity is around 300 feet per second more for the .308

Some L39's have been proofed at 20 tons for the .308 round.
But personally I stick with the NATO spec' when reloading for my 7.62.


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It's nice to be important, but it's more important to be nice!


Posted By: Shamu
Date Posted: January 16 2018 at 5:54am
the .308 barrels were much thicker & stronger than the .303 ones were. Look at MJ's pics of the barrels & you'll see.


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Don't shoot till you see the whites of their thighs. (Unofficial motto of the Royal Air Force)


Posted By: Honkytonk
Date Posted: January 16 2018 at 6:05am
I wondered if the went with a lighter powder load in the 7.62 NATO. Thanks for bailing me out!


Posted By: Pukka Bundook
Date Posted: January 16 2018 at 8:21am
Not beefed up Tonks, and that is why I wonderd about the Rusky conversion.
 
(India changed the steel for higher quality when they converted the No I Mk 111 though)


Posted By: Honkytonk
Date Posted: January 16 2018 at 9:22am
I had read that about the Ishapore.


Posted By: Zed
Date Posted: January 16 2018 at 11:40am
Both L42 and L39's are 7.62 NATO. They are not .308. 
Although obviously some people will put .308 ammo through them. 

Is the Ishapore actually a proper .308 or a 7.62 NATO ?


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It's nice to be important, but it's more important to be nice!



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