750iu is not sufficient. 2500iu to 5000iu every 3 or 4 days for 2 weeks will do the trick. Injecting that much sq will make a funny looking lump and disperse slowly. IM is the way to go with reasonable amounts.
BTW, I only use HCG for 2 weeks mid-cyle/with clomid....so that is my point of reference. Try this sometime on a long, heavy cycle.......you will gain size and strength immediately and give a nice cosmetic job to the nuts, as well.
I'm never off, so I can't give an end of cycle report.