I've been reloading for my Rem. 700 .30-'06. I've found a good load in the Nosler Ballistic Tip Hunting bullets in 165 gr. loaded with 57 gr. of IMR 4350. My groups are around 1.5 inches at 100 yr. I'm happy with this as it is a production rifle with no modifications like an after market trigger or even glass bedding.
The range I shoot at has 25 yd increments out to 100, then a tower that allows for up to 269 yd, don't ask, long story. I've looked up the ballistics information and I should be 4.4 in. low with a 100 yd. zero, but what I find is that it is closer to 9 in. The groups are still decent, to the point that I feel comfortable taking this shot, but I'm troubled by the fact that the book data is that far different from what I see.
Could the problem be with the load? Could it be the tower and the downward angle to the target at that range? Could it be the paralaxe of the scope? Or could it be something that I'm not think or?
Has anyone else had this happen? I'm curious and would like to have an answer just so I know.