I have a recently acquired AK74 and I'm going to the range to adjust the iron sights. I have fired it one other time and found it to be off quite a bit. My plan is to set up a target at 30 yards to get it in the ballpark then 50. The adjustable sight has marks starting at "1" Can I expect the gun to be sighted in for 100 yards if I get it adjusted at 50? basically I'm asking if there is significant bullet drop between 50 and 100 yards.