just purchased r10 and nickko sterling gamehunter site lovely kit but at distance some brands of pellets shoot to right i have zero in long distance and when shooting at target it moves to left its a mistery
when zero in at 30 yds bull every time at 60 yds it should drop which it does but it shoots to the right i dont know why , its not windage
Your scope may be off axis horizontally. Check to see if it's dead centre above the barrel, BSA's seem to suffer with this more than most, odd rail width seems to be the cause. Judging this by eye is not easy, so level the gun with a spirit level across the top of the action, and drop a plumb line down from the rear of the scope scope, you may be surprised.
If we assume the scope is to the right of the barrel, when zeroed at 30 yards the pellet will shift to the left when the target is closer, and to the right when further away.
In this video a scope mounted on to an Ultra is used. In the last shot, the slow motion one, you can see the pellet coming in from the right side:
http://www.vimeo.com/6538203And in this one, a HW 100, again in the last shot, you can just make out the pellet climbing directly up the centreline to the target:
http://www.vimeo.com/6435930(The images are not brilliant as it was a hand held cam at the time)
The reason is this off axis thing. The HW100 has quality mounts on a regular sized rail, the mounts used on the BSA where cheap ones, which coupled with the oversized rail gave me this problem, in fact the BSA was as much as 2mm off. The cure is to use BSA mounts, or those which are split vertically like the Nikko Sterling ones.
