OK... I like my replacement heifers to be 650+ at 205 days, bulls, if I keep one, will usually be 725 or so at the same age... That being said, I have fairly large framed animals (1500-1700 lbs mature), and good pastures, though we can have high temps (90+ from may to sept).
Then about bulls, I want them to be docile and not get excited about anything, whether they're actually tame, that's another question alltogether. The last bull calf I kept is now about 20 months old, 1500 lbs, and whenever he comes up to me for a scratching, I'll only give his hind end any attention.. NEVER PET THEIR HEAD OR NECK!... I've kinda trained him that if he wants attention, to turn his butt toward me to get it. I don't give him much attention, a couple pats on the back at feeding time will do.. once in a while he'll come around and sniff my boots. I figure if I wanted to I could ride him. I regret cutting my steer from last year, 940 lbs at 270 days, docile, well conformed and ridable... I'll have to get a pic of that
Just be careful with your bull calf, don't turn your back on him and watch his body language