I know what u mean,bro. my calves are pretty stubborn as well
my calves measure a mere 18 inches but I use an old Paul Borreson routine and he had decent calves!
it's a kind of triple drop method.
standing calf raise:
with whatever weight, rep until failure (I usually aim for about 15-20), immediatly after failure occurs stay on the machine but use no weight and rep til failure, immediatley after failure occurs get off the machine, stand on the floor and rep til failure.- thats 1 set! do 3 of them :twisted:
thats all he done for calves, its a total killer!
OR!
if thats not 'hardcore' enough, you could try The Luke Sauder Calf Routine. I've not tried it myself ... yet

ops: but maybe you could test drive it
Day 1: High-Volume
Exercise A: Calf Superset*
A1) Seated Calf Raises
3 x 10-5-5 (one set of 10 reps, followed by two of 5 reps) at a 101 tempo (1 second to lower the weight, no pause, and 1 second to raise the weight)
A2) Donkey Calf Raises
3 x 30-50 at a 101 tempo
*After finishing a set of the A1 exercise, proceed immediately to exercise A2. Then rest two minutes before repeating the super set.
Exercise B: Standing Calf Raises
B1) Standing Calf Raises
10 x 10-30 at a 111 tempo, ten seconds**
**In other words, you'll be doing one, long, extended set, resting ten seconds between each mini-set and lowering the weight in between.
Day 2: Low-Volume (to be done 48 hours after Day 1)
Exercise A: Triple Drop Standing Calf Raises
A1) Triple Drop Standing Calf Raises
3 x 10-10-10 (in other words, three drop sets) at a 121 tempo,*** resting 90 seconds between sets.
***The pause is taken in the bottom stretch position, and be sure to take the full two seconds.
....and thats all there is to it LOL!