Enfield in .223

[browningautorifle]

Is the pic on it's side? You dropped one?

[newcastle]

Yes its on its side. One flyer.

[magellan]

Sorry to resurrect an old thread.
Here is my Enfield 223 conversion using a 5 rounds CZ527 magazine:

[browningautorifle]

This is the exact thing we were asking about...feed devices. Good to see one that functions correctly.

[Bindi2]

So are you going to down load the 223 rounds to 303 pressures.

[browningautorifle]

down load the 223 rounds

I still think I'd use something like a 340 Savage mag cobbled to fit and use 30-30 Winchester for cartridge availability. Maybe an altered #1 or #4 mag would work too.

[Bruce_in_Oz]

.223 extractor?

A "tweaked" extractor for the No. 2 .22RF trainers should also work; already heat-treated and blackened.

Hope to get a "faux" No5 or similar style up and running this year.

The CZ mags also come in 7.62 x 39 (if you can find them).

I had a tinker with 10-round Ruger Mini-14 mags, but the spring is designed for autos. Chopping turns off the spring is not the way to go. You need to wind a spring to the same overall design and length, but with thinner music wires

Anyone thought of doing a 6mm PPC or 6.5 Grendel on a No4 action? Same head size as 7.62 x 39.

[WillSarchet]

So are you going to down load the 223 rounds to 303 pressures.

No reason to. .223/5.56 is lower pressure than .308/7.62, which the No1 handles adequately and the No4 does fine with. Smaller case allows for thicker chamber walls as well and a smaller case head means even at higher pressures the amount of bolt thrust should be similar.

[Bindi2]

Be OK in the P14/M17 action not the No4.
308 max 62k
Nato 144gn much less which is what was used in the L42 and range rifles if the action passed proof (they all didnt)
5.56x45 55k psi
303 49k psi or 45k cup.
The bolt thrust will increase in relation to pressure increases.

[Woodsy]

Be OK in the P14/M17 action not the No4.
308 max 62k
Nato 144gn much less which is what was used in the L42 and range rifles if the action passed proof (they all didnt)
5.56x45 55k psi
303 49k psi or 45k cup.
The bolt thrust will increase in relation to pressure increases.

Sorry but your method is wrong. Thrust is measured by the operating pressure multiplied by the internal area (in square inches) of the base of the cartridge (which is then further reduced by the external area of the base which is then reduced by the surface area of the locking lugs). For the purposes of this exercise we will stick with the basic case thrust. In the case of the .223 cartridge multiply the pressure (55,000 PSI) by the internal base area (.305" diameter) which is .0767 square inches, giving a thrust figure of 4,218 PSI. The .303 at 45,000 PSI and an internal base (.385" diameter) area of .1105 square inches gives a thrust of 4,972 PSI. From these figures the .223 is well within the .303 pressure and perfectly safe in any .303 action in good condition.