Even with HCG your nuts may still shrink some, especially in a large cycle. My last cycle, which was pretty heavy for me, I ran 500iu hcg e5d and my nuts still shrunk a good deal...I can't imagine what it would have been like w/o hcg.
BTW, as you most likely know, they do come back...mine are already regaining their normal size and I've only been on PCT for 2wks.