By a surprising amount of popular demand, here's what Bloke did to get his 1945-dated Indian Ishapore-built .303" SMLE no.1 Mk.III* ("Iffy Ishy") ready for the range.
And the answer is: basically as little as possible. But this was a bigger task than he first anticipated!
Also contains some detail on how the SMLE's bedding / stocking up works.
Also includes range footage at 300m.