Limit Bankroll Rule of 300BB, always correct?

[The_Wreck]

I am posting here becuase I play at $0.5/1 limit now and looking to move up to 1/2 2/4 sometime soon, but was wondering how the 300BB bankroll rule changes at different stakes for full ring and 6-max (500BB) up to say 5/10? I apologise if this has been answered many times before, so if anyone can direct me to any old threads about this, that would be great, thanks.