Question on PC Hesitation. Please feel free to send me down in flames as i'm not a base jumper but thought people here would be well equiped to answer this question.

The other day I did quite a low altitude balloon jump (low for me but not for you, left @ 2500ft) did about 8 sec delay and deployed normal ZP 32" PC from BOC on a sabre 170. Anyway it scared the living **** out of me when I had about a 3 second hesitation.
I was under the impression that an 8 sec delay would be fine on this size PC. Body position was good, gave it a good hard throw out and closing loop was not to tight. Any ideas about the hesitation.??
Thanks
George