In East Central Minnesota you can't expect a big rack to go along with a 300 Lb body. Some deer that heavy will have itty-bitty racks you could catch a cantaloup in. Big racks in that area tend to be pretty uncommon. You see big racks once in a while, but I wouldn't go looking for one there.
The biggest deer I have shot was well over 200 pounds dressed and had a pretty dinky rack.
It's an interesting experience when you start weighing the boned-out meat to make sausage and realize that you have a good 20-30% more meat by weight than a usual "big" deer that you've processed.
I mean interesting in a good way.
