That happens. One time I was training with our states' biathlon team. It was shortly after the winter Olympics. I checked my time and found it was only 2 mins shorter then the Russian's Olympic Gold Metal winner that year.
I felt pretty good until my Biathlon NCOIC reminded me I was skying 7.5 K, the Russian got the medal in the 20 K.
I gave up biathlon after that leaving it for the young kids.