Not sure where to put this so here goes. Went out back to shoot today. Got a hold of some Lake city M118 LR 308 . So wanted to shoot a few. about 1.30 pm Sun was high in the sky no clouds. The snow was bright. My scope is Leupold VXII 6X18 AO. It almost seemed like while in the scope, the bright snow was bothering my eye. Like to the point where I couldnt hold on the bullseye. Now My thought on this is I shoot right handed ,but Im left eye dominant. I can usually shoot for 40 rounds or so before my eyes get tired. After 6 shots today I was having a real hard time. First couple Groups were just at 1 inch. after 9 shots groups opened up to 2 inches.. I cant recall this ever happening to me.