Maybe you've all seen this already but I thought I'd mention it for a heads up on a good deal.
Cheaper Than Dirt (I know, crooks, but it's still a good deal) has surplus .303 British for 20 cents per round. It's "grade B" but what I got (480 rounds for $96) was about 3/4 clean as is, the rest cleaned up ok, and it's all HXP- non corrosive, boxer and reloadable.
I shot some today, shoots great. Hard to find good brass for that price.