i would be know the differentes between Northfork and rhino bullets, which expand more, which expand more fast?
Now i use northfork in caliber 9,3x62 250 grains, but with little pig is too much hard

I don't think anyone has attempted a comparative analysis of both brands of bullets. Besides, both Northfork and Rhino make three kinds of bullets in most calibers and sometimes several weights in the same caliber. It would be a mighty study to get any comparative info. What I can say is that most users of both seem to indicate that they are satisfied with the results.