I had a small lot of .303 Mk IV ( I think) dated 1912. 2 rounds went into my collection, nobody was interested in buying any of the rest, so I took it to the range. All went bang except 2 (out of about 60) and was as accurate as my HXP 75 Greek surplus Mk VII.
As the others have said, if it's been stored cool and dry, just shoot it and enjoy it!

Larry