I do only 2 sets of seated calves. Only work with toes out. Do them real slow go heavy 3-5 reps. Ihave 19" calves. Watch u don't overstretch. Plantar fascitis could be a liftime partner and it sure can cripple your workouts. Also I only do calves twice in 9 days. I used to train like u and couldn't get passed 16" calves . Maybe your body is slow twitch .I train everything twice in 9 days. When I started this routine years ago I was stuck 161/2 arms. In 6 months calves and armes went to 19. arms to 191/4. I have never gonew on the juice. When I was younger just ate,no supplements. 3-5 reps ,2 sets go heavy every workout for about 4 weeks then cycle to about a week of 1 set 35 reps. u can do 2 weeks of high reps. Another thing 15 min. high intensity aerobics hepls the mind to deal with the negatives if this high intensity stuff. hope this helps.
larryjoe.