Ingram, my arms are about the same size.
They are really starting to grow since I cut down on the volume. Since I follow DC training, I am getting more rest. The training sessions are absolutely brutal. Here is a typical arm session for me:
1. Lying Triceps Extensions (skull crushers) - 1 x 12
warmups: 70lbs x 8, 90lbs x 5, 110lbs x 3
building set: 130lbs x 12, this includes 9 then rest pause 3, then a static hold at bottom.
2. Barbell Curls - 1 x 12
warmups: 70lbs x 8, 90lbs x 5, 110lbs x 3
building set: 140lbs x 12, this includes 10 reps, then 2 rest pause, a static hold at top, then a controlled negative
My arms are totally blitzed from one set!!! Of course, I add variety by using close grip bench presses, parallel dips, preacher curls, and dumbbell curls.
hopefully a few months from now I can reach 18". To do this I must eat an insane amount of food. Let me know how your training progresses.
LS