For people who wish to train with serious intent: When in doubt about calf training, try doing 4 to 6 cycles of 30- 40 yard sprints for calf growth. This also hits the abs very strongly. Can also do these in sand, barefooted, for serious growth. Also run grades, sand or firm earth.
With regards to barefooted, try doing any calf raises type of work barefooted for a better stretch, feel and toe grip. More so than most $120 shoe offers. Gripping is an important factor for the calf's, with the shin getting extra work. Good Luck.
Side Bar: Carlsbad Beach,weekend, straight down from Fidel's, to get some examples of heavy beach sand sprints. Right after those, run up the hill to PCH for a finisher to the calves. Who's knows, I might be there.