i inherited a lee enfield for my birthday, it has the Mk.3 pop up adjustable peep sight. the peep sight when it is fliped down has a big hole and not the small hole. when i was at he range today firing it for the first time and getting used to it i put a nice group of 3 at 50 yards so i moved to 100, and i couldent hit the target worth a dam... i was using 10 bullets that came with the gun so i dont knwo what grain they were. so, i was wondering what i need to do to get my gun shooting accurately at 100 yards. i know i was shooting high cause there were no bullet holes to the right or left anywhere. could it be the big hole peep sight? if so where could i get a mk3 sight with a small hole? i have so many questions and no answers cause google wasent doing **** for me.. so i wanna know what it will take to get my enfield shooting accurately.