Shot a 1942 Maltby No. 4 Mk. 1 today.....Gads!

[togor]

New to me, in good condition overall. 2 groove war expediency barrel. Prvi 174 gr. FMJBT. Zounds! This rifle couldn't hit a barn from the inside with that boat-tailed ammo.

Anyone have a projectile they like?

To me locking at the rear of the bolt and screwing on the extractor head are about as dubious ideas as they come. This said I think this fired brass can be sized to the chamber and made useful if there is a projectile worth the effort.

[CINDERS]

Have you gauged the bore, throat wear, whats the crown like & the muzzle, is the trigger guard front screw tight with the action collar in place, how is the bedding of the draws and up lift at the muzzle lots of stuff can contribute more than just BT's failure.

My sniper T had about a 10-15 moa group at 100m why ! the draws were toast so had to have them repaired it now clover leafs at 100 well at least it did for my mate who shot it !

[Alan de Enfield]

This, combined with using BT bullets could be one of the problems .....................................

Use of Cordite in Rifles

'Regulations For Army Ordnance Services', Vol.3, Pam.11A (1949) comments:-

APPENDIX 15

USE OF .303-IN CORDITE AND N.C. AMMUNITION

1. The action of Cordite propellant in the barrel of a .303-in. weapon is quite different from that of N.C. propellant.
Cordite gives a rapid build-up of pressure with great heat, leading to pitting and erosion of the chamber end of the barrel.
N.C., however, gives a more gradual build-up of pressure with less heat, and this in turn gives uniformity of barrel wear from chamber to muzzle, the amount of pitting and erosion being greatly reduced.

2. With Cordite propellant, set-up of the bullet is most pronounced and even when the chamber end of the barrel is well worn, the muzzle end still has sufficient rifling left to impart the necessary spin. As the wear advances up the barrel, so the accuracy of the weapon is progressively reduced.
With an N.C. propellant, set-up of the bullet is slow and by no means so pronounced, due to the more gradual building up of pressure. The barrel retains its original accuracy until wear reaches a critical stage, when a sudden falling off in accuracy occurs.

3. It can be seen by comparison with the effects of barrel wear that to use N.C. ammunition in a barrel which has fired Cordite will give serious inaccuracy in flight, whereas the use of Cordite ammunition in a barrel which has fired N.C. gives good accuracy, but serious changed the wear pattern of the barrel.
In the first case, i.e. a weapon which has fired Cordite ammunition the barrel will be eroded and fissured in the first few inches up from the chamber, the part in which obturation should occur. The poor set-up of the bullet, in the N.C. cartridge is not sufficient to give good gas sealing in such a barrel and the bullet does not, therefore, receive the maximum impulse. The resultant loss in velocity and instability due to lack of spin lead to a high degree of inaccuracy.
In the second case, Cordite ammunition fired from a barrel which shows uniformity of wear from firing N.C. ammunition, has an adequate reserve of set-up that ensures full gas sealing, with satisfactory velocity and spin. Unless the barrel wear is in a advanced stage due to firing a large number of N.C. rounds, there will be no immediate appreciable loss in accuracy. Furthermore, the decline in accuracy for Cordite ammunition will follow the normal gradual fall-off experience in weapons firing Cordite alone, as the wear at C of R progresses.

4. Trials have proved that even if only a few rounds of Cordite ammunition are fired from an "N.C." barrel, the ensuing accuracy life when N.C. is subsequently fired is reduced considerably. The occasional and restricted use of N.C. in a "Cordite" barrel will however, have little effect on its ensuing accuracy life for Cordite, although naturally the fire of N.C. will not be very accurate.

5. The effect of wear of barrels can be determined by firing shots through a paper screen at 100 yards. If, on examination of the screen, all shot holes are not perfectly round, then the barrel is no longer fit for use.
The danger lies in the fact that bullets fired erratically from badly worn barrels may overcome their instability in flight and take up a steady flight in the direction in which they happen to be pointing, with short-ranging and disastrous results if used for overhead fire. Except under these conditions of long-range firing there is no risk involved, though in normal range firing inaccurate fire will result.

6. The following instructions regarding the use of .303-in ammunition have been issued to users and are governed by stocks and types of ammunition and weapons in current use:-

(a) .303 in. Vickers M.G.s in M.G. Bns.

(i)Mk.8z only will be used for overhead firing.
(ii) Mixed belts, i.e. Ball, Tracer, A.P., etc., will NOT be used.
(iii) Any barrel which has fired Cordite ammunition will NOT be used for N.C.; barrels will be stamped “7” on the trunnion block and returned to R.A.O.C. through normal channels.
(iv) Barrel life for N.C. will be assessed by unit armourers using the appropriate gauges.

(b) .303 in. Vickers M.G.s in A.F.V.s.

Here the overhead fire problem is not considered; the range is usually less than is the case with ground M.G.s. tracer ammunition is required as an aid to fire control, and prolonged fire programmes are not envisaged. Special mixed belts of Mk.8z and Tracer are provided in boxes clearly marked “For use in A.F.V.s only”. The reduced life of the barrels is accepted.

(c) Light M.G.s.

Cordite ammunition normally will be used. N.C. ammunition, however, gives a relatively small flash at night and if the Bren is being used for a special purpose, e.g., on a patrol, its use is permitted.

(d) Rifles.

N.C. ammunition will not be used in rifles except in such circumstances as quoted in para. “(c)”
above, if necessity should arise.

7. Belt packed S.A.A. for M.G.s is packed in boxes which are clearly marked with labels or stenciling indicating its proper use. It will never be de-belted and used for practice purposes in L.M.G.s or rifles.

8. It must be noted that the above restrictions apply only to ammunition fired from British weapons. All American ammunition is N.C. loaded and their weapons are designed to fire it satisfactorily.



The BT has relatively little contact with the rifling and does not upset easily compared to the open bottomed MKVII round.

[togor]

The barrel does not have a lot of rounds through it judging from the muzzle end. Good idea I think to make a poor man's throat gauge by pulling a bullet from this Prvi ammo and soldering a wire to the end of it, to see if there is substantial erosion.

Action screws were tight. Some barrel movement at foreend which I guess is normal?

Were I to guess it would be this barrel, which is 2 groove, cut back-asswards from how one would think it should be done. Can see how bullet would only haphazardly engage those grooves. If I find a bullet to load then memo to self to stay away from slower powders. A Swedish Mauser this is not.

I understand people find this sort of quirkiness has a certain appeal but boy this rifle has all the short cuts. Peep sights, no grip cuts on the cocking bit, no half cock. Would have been tough going to fight Jerry with these.

[Alan de Enfield]

The barrel does not have a lot of rounds through it judging from the muzzle end.

You are wasting your time looking at the muzzle - it is the 1st 3" of the barrel where all 'the action' takes place - read the first paragraphs that I quoted in Post #3. A rifle that has fired cordite will be worn at the chamber end and due to the way that Nitrocelulose works the bullet will not have suffcient 'kick up the bum' to upset into the rifling.

What makes it 10x worse is the fact you have the war-time expedient 2 groove barrel.

The only way you will get any sort of accuracy is either to use the correct MKVII (not MKVIIZ) ammunition, or home-load a full-power, open ended, parallel sided 174g bullet

[togor]

You are wasting your time looking at the muzzle - it is the 1st 3" of the barrel where all 'the action' takes place - read the first paragraphs that I quoted in Post #3. A rifle that has fired cordite will be worn at the chamber end and due to the way that Nitrocelulose works the bullet will not have suffcient 'kick up the bum' to upset into the rifling.

What makes it 10x worse is the fact you have the war-time expedient 2 groove barrel.

The only way you will get any sort of accuracy is either to use the correct MKVII (not MKVIIZ) ammunition, or home-load a full-power, open ended, parallel sided 174g bullet

Yes, will check the throat on this one.

I read the 5 groove barrels are more forgiving.

[Neuraleanus]

I did not know that Maltbys used the 2-twist barrel. I thought that was reserved for Long Branches and Savages.

On the subject of ammo, I have gotten good results using PPU 174 grain FMJ. The 150 grain stuff sometimes has feeding issues.

[togor]

I did not know that Maltby's used the 2-twist barrel. I thought that was reserved for Long Branches and Savages.

On the subject of ammo, I have gotten good results using PPU 174 grain FMJ. The 150 grain stuff sometimes has feeding issues.

You would think!

On this day two Garands were holding the black with HXP on a SR-1, then the No 4 comes out and it wants to shoot a 15" circle. Gotta figure it out. Sometimes that is fun, sometimes not.

If nothing else a specimen from that period right after the main peril had passed, while busy replacing as quickly as possible the many rifles left for Uncle Adolph.

[Brian Dick]

If you're an engineer, I'd think you might want to buy the gauges from APEX or BRP to check your rifles properly.

Here are the gauging standards:

.310 plug shouldn't enter the chamber more than .25"
.307 plug shouldn't enter the muzzle more than .25"
.301 run must run through the bore.

It doesn't have to look worn out to have throat wear from hot burning cordite. It doesn't take a lot of rounds to get the wear pattern in the throat. You need good Mk.7z ball ammo with the 174 grain flat base bullet. PPU, S&B and most other new ball ammo is loaded to Mk.8z specs with the 174 grain boat tail. The Mk.8z was designed for the Vickers MMG, not rifles. I've had good results using the .311 180 grain Sierra Pro-Hunter if you're going to roll your own.

You're right. It ain't a Swedish Mauser. It's a battle rifle that has served worldwide for over 100 years in many guises. They will shoot 2-3" without effort at 100 yards when serviced and fitted together properly. There's nothing quirky about the Lee Enfield. It is what it is.

[togor]

https://www.milsurps.com/showthread.php?t=16377

Reading this.

BTW this is a great site for these rifles. Even an ugly child needs love and these British rifles find it here.