Would like to pull 300kg raw and think I could probably do it so I guess I'll find out next rack session.
On that subject, I have a question. What's the deal with belts, when is it worth considering getting one?
If you asked 48 people you'd probably get 48 different answers so I'll just give you my spin. Ultimately no-one NEEDS a belt but it can be a great tool to help with your training. A belt basically helps you generate intra-abdominal pressure so if you can do this on your own and have a very strong core then a belt is not needed. My belt just gives me something to push against and build the pressure.
I've seen many people using belts but using them incorrectly so expect a little bit of a learning curve. The more proficient you are at using your belt the more you'll get out of it. Since you've use the rack pull as an example I'll use that to demonstrate. I've recently pulled 272.5kg without a belt but 350kg with a belt. I must stress that this difference is not always so great and goes to show that I'm very good at getting the most out of my belt.
So basically its preference however I will say that I feel my belted lifts will always be higher than my raw lifts. Would I recommend buying a belt? Yes, they are cheap and last forever. A good belt will last you a lifetime, you don't need anything fancy. Mine is a 2 prong power belt which cost me ~£30 and I can't imagine ever needing another one. There is one warning I must stress, a belt is no excuse for poor form so sort out any form issues first, don't simply mask them by putting a belt on.
"We are what we repeatedly do. Excellence, then, is not an act, but a habit." -- Aristotle