I have my first 303 enfield coming in tomorrow. It's a No4 Mk 1. Several years ago I acquired some 303 ammo. I'm wondering what it is and if it might be corrosive. Can I use it? Thanks for any info.
Two boxes are marked : 48 cartridges
.303 inch Mk V11z
WINCHESTER
made in U.S.A.
They are headstamped WRA 1943 303
One box is marked : 32 cartridges
303 inch
Mk 7
an arrow
I.S.A.A.
The box is still taped shut, and stamped over the tape is " RG 11 8 53 C "
There is a plastic ammo box with 20 rounds of ammo marked "RG 53 7"