I made a stupid mistake when moose hunting, I put my Winchester M70 30-06 with boresighted scope on my front rack and the terrain was very bumpy etc..
Now I see the zero did not holod on it.. does it mean the scope is wasted ??
First, I would be surprised that your scope is wasted (no longer useable). Like many people have said, boresight it as well as you can (repeat it a couple of times) and then go to the range and do the final sighting.
Boresighters are usually fairly repeatable (not necessarily accurate) and for this reason, can be used to verify if your scopes adjustments have been
significantly knock off alignment during hunting. After sighting at the range, you should check where your reticule lines up on the boresighter for reference purpose in case you need to do some checking later on.
This happened to me during the last moose hunting season when I hit my barrel against a rock. My scope reticule was knocked off by a number of divisions (4"/div) in the windage plane as checked by the boresighter and based on my recent sighting numbers at the range.
Also, because my rings are very high, the boresighter has my elevetion zero aprox 3.5 div high on the boresighter which is equivalent to approx 14" at 100 yd. This is not a problem as I know this offset and only use it for reference.
I don't have any further test results on the scope and as far as I know, it could be damaged.
In the end, I would be surprised that a bumpy ride on an ATV would significantly change the settings of a quality scope.
BTW, what is the change on the boresighter in div and inches at 100 yd? (1 div. = 4" at 100 yd on Bushnell BS)
Duke1