i'm new here and i've been reading alot lately about the 260 rem and considering having one built on a 700 action.it will mostly be used for some whitetail hunting and target shooting in the 300-600yd range.i am interested in the 260 ai version for the extra velocity and low case stretching benefits,and possibly shooting at 1000yds. as i gain experience with wind drift,drop, etc.. if i go with the standard 260,how much case stretching and trimming can i expect vs. going with the 260 ai ? i have not yet seen any discussion yet on this topic,any recommendations would be greatly appreciated ,thanx