The most important stuff was allready covered. But I will add:

-Were you in any sort of hurry? How about distractions? Funny but if I have had a lot of caffiene, if its very cold/hotor if I have to use the bathroom, that will dramatically influence the way I shoot.

-How about breathing? Were you consistent in your breathing: inhale, hold, squeeze, exhale.

-Gun holding/use of a bench rest. "Listen" to your body. Were you in a comfortable position that you could comfortably hold? Or were you straining (any) muscles to get in to your shooting position? What sort of bench rest, if any were you using? Was it the junky range rest that is never seems to be just right? Or was it your personal rest that you can set to what works best for you?

-Scope adjustments: when zooming in your scope, the eye relief will often be dramatically reduced. Many people will unconsciously move their heads forward to get a full field of view. This to will effect your aim/POI.

Just some things to consider.

~Robert