Did you have plenty of "soap"? I notice when pulling cat 5 and coax with a similar PVC jacket that the "77" really makes a huge difference. Compared to that the nylon jacket on THHN is real easy to pull.
I have found that if you use your vacuum to suck some lube through the pipe from both ends before you start helps a lot.
You usually jam at the turn up it seems, so sucking some lube in from the far end is handy.
