same for me...
i put 115lbs on seated preach curl but i have never seen this ball look in my bis... and i hit them hard... almost 16" but i saw teens at my gym that got 17+ gunz at 17years old and they cannot lift more than 90lbs on the curl bench
and, no they dont even take AS...
i gain almost 1.5" this year but they lagged for 2 or 3 month and im on cycle
im well proportionned at 190lbs lean but my tiny bi's wont grow and it pissing me off...

i was thinking of overtrained it for 2 month to see any gain.
3 bis session a week with 4 ex par session with high reps.

what do you think of that?