POF mk7 to the same standards as British made?

[martins8589]

I have sectioned some RG MKVII projectiles and they had the fibre filler but the jacket was copper washed steel!

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[Fruler]

I have sectioned some RG MKVII projectiles and they had the fibre filler but the jacket was copper washed steel!

I section my Royal lab 1939 and it had aluminum tip

---------- Post added at 10:39 PM ---------- Previous post was at 10:37 PM ----------

I much prefer Mk.7z with the nitro powder. The cordite stuff is OK but not for my purposes around here. Those in the USA who haven't bought any of the German MEN 83 dated Mk.7z from SG Ammo are missing the boat. It's fantastic stuff. I was range testing a recently restored No.4T yesterday and it was shooting consistent groups around 2" at 100 yards. Considering the spec is 3" at 100, I certainly won't complain. They raised the price $20 a can but it's still well worth the money.

What is mk7z? Is that just a solid lead slug? I bought some of the MEN 83 lot 8 and I assumed it's solid lead bullet. I chronographed it, 2388 fps average out of my no4 mk2 fazakerly... About 10 feet from muzzle.

[Bruce_in_Oz]

Mk7 Z indicates a "nitro-cellulose granular powder. The bullet is the tried and true one as used in standard Mk7.

One of the reasons for its introduction is that Cordite has a fairly severe flash. This is a bit of a liability when used in aircraft guns at night, a common practice in the RAF.

Almost all North American production was essentially Mk7Z. the exceptions were the huge production from the Canadian Dominion Arsenal plants (DA. DAC, DAL, DAQ headstamps), a different company from Defence Industries (DI / DIL / DIV headstamps) that seems to have all been boxer primed and NC powder filled. There is, apparently a "different" DI headstamp that originates in India; probably a mercuric / Cordite product; never seen one, however.

I have not found any references to US manufactured, Mercuric-primed, Cordite filled .303 ammo; anyone else? Bear in mind that the US was making contract .303 going back to Mk 6 days, as well as 7.62 x 54R for the Russians, along with whatever other orders they could find.

The Russians appear to have made .303 as well, probably to feed into their Ross rifles.

[Fruler]

I was under the impression that mk7 bullets had to have some sort of filler at the tip, eith aluminum of wood pulp or something else, other a solid lead slug. I believe this MEN ammo is solid lead, with no fillers, does that make it a mk7 bullet? Kind of confused here lol. Yes it is a granulated powder.