Help iidentifying 303 ammo

[magyars]

Help with ammo Identification
Before shooting this ammo I just received I am attempting to ID it, and determine if it is corrosive...box of 32 cartridges...Box is marked 303 Inch, MK7
C.I.A (P)
-------
P.O.F.
the headstamp is as follows
67 L POFicon

Information

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[vintage hunter]

P.O.F.=Pakistani Ordnance Factory
Yes it's corrosive and you'll most likely have a lot of hang fires and a few duds.

[magyars]

Thanks for the info.....Would it be better if I pulled the bullets? Change powder, or just fire them and clean the SMLE good after?

[vintage hunter]

Shoot it as is if you can tolerate the hangfires and clean the rifle afterwards. I can't so I transfer the cordite and bullet to a new case and with a good modern primer. Tedious but rewarding.