I'm not a hunter. If I were, chances are I'd be using a .57 Snider or a .43 Mauser for everything that a .303 can't handle. I do, however, have a friend who was one of the finest hunters you will find anywhere. His health precludes him hunting these days, but we waste a lot of time at the range.
HIS experiences with Match bullets on game is precisely what Sierra says: sometime they will wor, often they don't. Match bullets are harder than hunting bullets, so the jacket doesn't deform as easily. Also, the very small hollowpoint on the better ones (and this definitely includes Sierra: take a look at their scores) tends to CLOSE on impact. The result is just the same as shooting the animal with an FMJ.
Your best bet is a bullet designed for the job at hand, even if it does coat 30 cents.