I have sport match rings and when i put them side by side on the rail, facing the opposite way i can see a small gap. It probably makes sens for those who watched AirArmsHuntingSA's video of how to mount a scope. My rifle is zeroed at 50 yds and when i shoot at 90 yds my POI is 1to 2 inches to the right. Same thing happen's when i shoot at 25 yds, my POI is about 1 to 2 inches but to the left this time. So my question is : is the problem because of the mounts or something else? If yes, what mounts would you recommand me? Thanks
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scope mounts problem?
- Thread starter Alex
- Start date
Your are describing cant as far as your impact.
BKL mounts are very nice and work well on most rigs.
John
BKL mounts are very nice and work well on most rigs.
John
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Iv had similar problems in the past It was very annoying I was adamant it wasn't a mount problem because they were quality mounts that I have on other guns but it turned out that they just didn't work for whatever reason on that particular rifle, I switched the mounts to another brand and everything was fine.
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Inexpensive scope mounts will throw your scope out of alignment from the phenomenon you described. Try BKL mounts, they're designed to deal with that specific issue. If you're still off after that its that you're either canting the rifle which means you're leaning it one way or the other when you shoot or your barrel probably needs to be indexed because it isn't lined up with the breech block. In other words, it might be bent slightly.
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I have encountered something similar and been in email correspondence with Sportsmatch about it. Note, this applies to all mounts designed to work within the range 9.5 - 11.5mm dovetails. If the ring was found to be centred on a 9.5mm dovetail it would be offset from centre by 1mm on a 11.5mm dovetail.
Geometry indicates, in worst case, this would only cause a POI difference of 0.5mm at 25yds and 0.8mm at 90yds if zero'd at 50yds; I think there is something more to it than just the mounts. Like spysir, I suspect cant (i.e. holding the rifle off of vertical when you are taking a shot). A level will allow you to check that you are holding the rifle correctly.
Geometry indicates, in worst case, this would only cause a POI difference of 0.5mm at 25yds and 0.8mm at 90yds if zero'd at 50yds; I think there is something more to it than just the mounts. Like spysir, I suspect cant (i.e. holding the rifle off of vertical when you are taking a shot). A level will allow you to check that you are holding the rifle correctly.
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I see the 'self centering' mounts are for pictanny / weaver rails, which (within the specified manufacturing tolerances) are one width. The problem arises when the mount is sold as being suitable for a range of dovetail widths.
Sportsmatch sell a windage adjustable mount (ATP65 and ATP66) that can be used to centralise the scope.
And no, before anyone thinks I'm pushing a particular manufacturer, I'm not - just sharing my limited experience. As a sponsoring manufacturer, would Sportsmatch like to speak definitively?
Sportsmatch sell a windage adjustable mount (ATP65 and ATP66) that can be used to centralise the scope.
And no, before anyone thinks I'm pushing a particular manufacturer, I'm not - just sharing my limited experience. As a sponsoring manufacturer, would Sportsmatch like to speak definitively?
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You can shim a scope mount, the base that is. Put something on the side of the base and then clamp the mount down, trial and error until you have your scope centered.
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try different mounts and different guns. had the same issue with a UTG scope. Didnt matter what mounts i put it in or what gun it was one it would right of zero from 0-50yds and left of zero 50+ yds. Ended up warranting the scope and got a new one didnt have any issue with the new one.
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I'm having the same problem. Just purchased a set of sportsmatch, adjustable rings and I have to adjust my windage so much on my hawke sidewinder 30 8/32/56. Not sure what to do
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might just want to crank the turrets around to loosen them up. got a hawke sidewinder with the problem you have. I just cranked up and down, side to side and it fixed the problem. just my 50 cents on this 1.
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Same problem here, bought sportsmatch adjustable weaver mount for my Vulcan. First I centered the scope and when i tried zeroing with my sidewinder tac 6.5-20x42 it was about 6 inches to the right at 25 yrds
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I would just slap a set of BKLs on and be done with it. The Sportsmatch are definitely not cheap, but they are not self centering either.
Since putting a set on my first PCP I would not consider anything else.
You might give your mounts a close inspection for burrs.
Sounds like a clear case barrel and scope alignment.
Since putting a set on my first PCP I would not consider anything else.
You might give your mounts a close inspection for burrs.
Sounds like a clear case barrel and scope alignment.
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