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abintx
Guest
a scope loosing zero ??? Is it progressive or does it all go at once ???
In my experience....
In my experience, they go all at once, but...some fail to such a small degree that it's hard to pin the problem to the scope. There are times when you really need a "standard" scope to compare to, particularly if the scope is off to such a small degree that if you send it in, there is a good chance it will be returned with a "scope is in spec" statement attached.
Hood used to make an attachment that two scopes could be mounted side by side on your rifle for comparison. I have one, but have never had an occasion to use it.
In my experience, they go all at once, but...some fail to such a small degree that it's hard to pin the problem to the scope. There are times when you really need a "standard" scope to compare to, particularly if the scope is off to such a small degree that if you send it in, there is a good chance it will be returned with a "scope is in spec" statement attached.
Hood used to make an attachment that two scopes could be mounted side by side on your rifle for comparison. I have one, but have never had an occasion to use it.
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nonliberal
Guest
I had the occasion today. I worked on a load most of the morning that showed alot of promise but I was getting a real small group and then another small group about 1/4" low and right. It might be a 2/3, 3/2, 4/1 or whatever combo but I always had the same pattern of 1/4" low and left.
I was ready to pull my hair out after I tried almost everything I could think of. Even though the scope has always been reliable I switched it out and did'nt have that problem any more for the rest of the day. Now its all just one small group.
On a few other guns I shoot I probably wouldnt have noticed the 1/4" shift. Everyone needs at least one good shooting gun and one good scope to compare and spot problems.
I was ready to pull my hair out after I tried almost everything I could think of. Even though the scope has always been reliable I switched it out and did'nt have that problem any more for the rest of the day. Now its all just one small group.
On a few other guns I shoot I probably wouldnt have noticed the 1/4" shift. Everyone needs at least one good shooting gun and one good scope to compare and spot problems.
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mike southard
Guest
scope
Last year at Moorland, OK a friend of mine was shooting along with no problems at all. Then he had several shots jump plumb off the paper. Borrowed a gun from another shooter to finish the match. This was a low time scope which had never giving him a problem. It went bad in a heartbeat. I mean right now!! He does not use that brand any more. I think the best thing to do is spend 2K on a rifle and 10K on a scope.
Mike
Last year at Moorland, OK a friend of mine was shooting along with no problems at all. Then he had several shots jump plumb off the paper. Borrowed a gun from another shooter to finish the match. This was a low time scope which had never giving him a problem. It went bad in a heartbeat. I mean right now!! He does not use that brand any more. I think the best thing to do is spend 2K on a rifle and 10K on a scope.
Mike
MatthewKeller
Member
Most of my scope problems have been fixed by adding a good barrel. Just a thought.
Matthew S Keller
(I've seen and heard of scopes go bad both abrubtly, as well as subtly. The best thing to do is go out in the morning before the wind starts, and see how small you can get the groups, and then put on a known scope, and repeat the process. I don't know of an easier, or more affirmative way to check.)
Matthew S Keller
(I've seen and heard of scopes go bad both abrubtly, as well as subtly. The best thing to do is go out in the morning before the wind starts, and see how small you can get the groups, and then put on a known scope, and repeat the process. I don't know of an easier, or more affirmative way to check.)
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John Kielly
Shari's fan club
I've recently had a pair of scopes fail on me. One took a time to identify because it happened while I was on an overseas trip & the precision loss was so little that I attributed it to being on foreign soil, until I returned & shot it against a known working unit.
The second went belly up over a handful of shots, obviously suffering a comprehensive failure. Believe me, this is a more manageable scenario.
The second went belly up over a handful of shots, obviously suffering a comprehensive failure. Believe me, this is a more manageable scenario.
Dick Wright
New member
A few years ago I was...
shooting at Holton and shooting quite well (for me). Suddenly my scope started to group 3/4" UPWIND for the previous POI. It stayed there and the groups were good but the sucker actually shifted 3/4" right into the condition at 100 yds.
Biggest problem was... it made the POI shift in the middle of a group.
Dick Wright
shooting at Holton and shooting quite well (for me). Suddenly my scope started to group 3/4" UPWIND for the previous POI. It stayed there and the groups were good but the sucker actually shifted 3/4" right into the condition at 100 yds.
Biggest problem was... it made the POI shift in the middle of a group.
Dick Wright
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K-Gun
Guest
I have one of Charlie Hood's "Scope Checkers" also but I think that mine is defective.
It shows that all my scopes are OK.
K-Gun
It shows that all my scopes are OK.
K-Gun
Boyd Allen
Active member
Once, at a Visalia match, a very good shooter from Southern California was having problems that seemed to be caused by his scope, a Weaver I believe. I asked him if he had ever tried "exercising" his turrets. He was not familiar with the term (This involves turning them to their limits, and then back to where they were.), but at that point was willing to try. After doing so, he went on to win a yardage, with that same scope. Just a thought...
As far as a reference goes, I think that one shooter, that I know, uses a Leupold 36 with a Tucker conversion with a solid rod in place of the spring. Cecil will do this if you ask him, but he says it makes it a pain in the neck to change turret settings.
As far as a reference goes, I think that one shooter, that I know, uses a Leupold 36 with a Tucker conversion with a solid rod in place of the spring. Cecil will do this if you ask him, but he says it makes it a pain in the neck to change turret settings.
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BJS6
Guest
I have had one scope go bad and it happened all of a sudden.
Rifle was shooting pretty reliably around the 0.25 kinda range. Put new scope on and it kept shooting that way for about 100 rounds or so. One the next range trip the first couple of groups were OK but the next 6 averaged right around 0.65 or so, more than double what the rifle would usually do in the good conditions. As much as I didn't want to believe it I fgured it had to be the scope.
A friend was good enough to take the scope off his rifle and we installed that on mine and proceeded to shoot a 0.28 and a 0.22.
Sent it back, they said the erector tube system was sticking so the scope was not returning to the same position after the recoil of each shot.
Rifle was shooting pretty reliably around the 0.25 kinda range. Put new scope on and it kept shooting that way for about 100 rounds or so. One the next range trip the first couple of groups were OK but the next 6 averaged right around 0.65 or so, more than double what the rifle would usually do in the good conditions. As much as I didn't want to believe it I fgured it had to be the scope.
A friend was good enough to take the scope off his rifle and we installed that on mine and proceeded to shoot a 0.28 and a 0.22.
Sent it back, they said the erector tube system was sticking so the scope was not returning to the same position after the recoil of each shot.