when we shoot at 1k we use a leica 77 20-60 and a zies 85 20-60 both scopes are capable of seeing 6mm holes at 1k if and i say it again if the conditions are good and they are in the white or blue never seen any holes in black we have days you cant see holes at 600. neither scope is current model leica is before apo lens and ziess before tfl. dont know if the new hd type lenses will help or not but they cant hurt anything but your pocketbook i think the ziess is better than my leica maybe the 85 mm objective or just better lenses i know that having verry good eye sight helps my freind can see holes with either scope way better than i can. hope this helps a little good luck