The biggest bull I ever had to mess with was about 3200lbs. Charolais. Gentle Giant. I could walk up to him in the pasture and slip a rope halter on him and take him back to the barn. He kind of liked his pressure washer bath.. He weighed 1608 at 12 months and a 1000 at weaning.at 3 years they should be over 1000 pounds BUT will continue to grow and gain for years longer. They can top out between 1700 to 2000 pounds.