Calves are stubborn! :(
All I can say is make sure you use full range of movement, all the way up and all the way down. Train them hard go as heavy as you can, try a few negatives with calve raises. Nothing but hard work, if I remember right Arnies early pictures were taken with him standing in water to hide his calves. He then went off to South Africa to stay with Reg Parkes to sort out his claves and he said 500 hours of work are needed.
Good Luck
