My Dad has some Pakistani or Indian, I don't remember, .303 British surplus he bought in the early 90's or something that is basically mine because he hates shooting it, about 400 rounds of it left IIRC.
I've shot about 200 rounds of it over the years, but none for quite some time now: Corrosive as hell, accuracy is alright at best and horrendous at worst (very inconsistent ammo despite being from the same crate), hangfires once every ten rounds and is generally crap. If it was 7.62x39, there'd probably five or more threads about it in this section about how you should avoid buying it at all costs, but since it's .303 British I could probably sell it for some stupid expensive price despite the fact that it basically sucks.
I'm keeping it, despite the performance it's fun to take the old Enfield out - the rifle is an absolute joy to shoot. I did buy a box of 20 180 grain Federal .303 British from Crappy tire a few months ago. After tax it came to 32 frigging bucks for the box, shot well, but still. Not the best round to shoot if you're looking for something thrifty and don't reload, which I don't. I remember seeing the footage of the Brits dumping spam can after spam can of .303 British into the ocean after WW2 and it still makes my blood boil! There probably wouldn't be much of it left even today if they had kept it and sold it all off as surplus considering the popularity of the Lee Enfield, and therefore the .303 British cartridge, in the commonwealth, but maybe it'd still be possible to find for a price that doesn't leave you feeling abused. Who knows.