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Shimming the scope
- Thread starter MOE.LB
- Start date
No. Burris ring's claim to fame is the inserts are in pairs. One half -5, the other corresponding half +5. Or 10....or 20. etc. When you shim you run the risk of bending the tube.
No. Burris ring's claim to fame is the inserts are in pairs. One half -5, the other corresponding half +5. Or 10....or 20. etc. When you shim you run the risk of bending the tube.
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I second this. The Vector/Victor are my favorite, I don't even use the set of FX i have.
I've been using these for a few months on my Pard DS35. I usually don't buy Monstrum, but it was cheap and I wanted to check them out.
So far so good.
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Your scope needs more angle. It's a very common problem with many rifles (powder and air).
For powder rifles they make great drooper rails that are low and allow your scope to mount low to the barrel using low picatinny style rings. For air rifles the angled rails are a thick, heavy abomination that generally raises the scope so high you loose cheek weld.
I've tried about every angled rail manufactured for air rifles and IMHO they are all sh!t. The rails manufactured for rimfire rifles (DIP, Area 419) will work dandy with some minor mods and only raise the mounting surface 1/4".
I have no idea why there are no good solutions made for air rifles but there aren't. Burris adjustable rings work great but they are tall, bulky and expensive. One piece mounts rarely have adjustment enough for proper eye relief. Picatinny drooper rails are super thick and necessitate a cheek rest. Low cantilever mounts provide no angle and are flimsy and POI will move.
After 6 years of fiddling with air rifles I'm DONE with trying to mount a scope. I have a bucket of mounts and rails that all work less than ideally. If I can't get proper scope alignment with a set of 2 piece rings I'm shooting open sights.
There are several manufacturers that offer 11mm dovetail rails that could be easily adapted to an air rifle with a standardized 11mm dovetail. Sadly the dovetail dimensions on air rifles aren't standardized. So we are stuck with bulky universal clamp on mounts that are less than the ideal solution.
It's a sad state of affairs when the best solution to a scope alignment problem is bending the barrel on your rifle. That's been the case for years and is still the most logical and inexpensive way to bring your POI close to the POA on an optically centered scope.
For powder rifles they make great drooper rails that are low and allow your scope to mount low to the barrel using low picatinny style rings. For air rifles the angled rails are a thick, heavy abomination that generally raises the scope so high you loose cheek weld.
I've tried about every angled rail manufactured for air rifles and IMHO they are all sh!t. The rails manufactured for rimfire rifles (DIP, Area 419) will work dandy with some minor mods and only raise the mounting surface 1/4".
I have no idea why there are no good solutions made for air rifles but there aren't. Burris adjustable rings work great but they are tall, bulky and expensive. One piece mounts rarely have adjustment enough for proper eye relief. Picatinny drooper rails are super thick and necessitate a cheek rest. Low cantilever mounts provide no angle and are flimsy and POI will move.
After 6 years of fiddling with air rifles I'm DONE with trying to mount a scope. I have a bucket of mounts and rails that all work less than ideally. If I can't get proper scope alignment with a set of 2 piece rings I'm shooting open sights.
There are several manufacturers that offer 11mm dovetail rails that could be easily adapted to an air rifle with a standardized 11mm dovetail. Sadly the dovetail dimensions on air rifles aren't standardized. So we are stuck with bulky universal clamp on mounts that are less than the ideal solution.
It's a sad state of affairs when the best solution to a scope alignment problem is bending the barrel on your rifle. That's been the case for years and is still the most logical and inexpensive way to bring your POI close to the POA on an optically centered scope.
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Why go through all the trouble of shimming when you can buy a 20 moa mount or a nice set of adjustable rings?
Great visual great post @nervoustrig !
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For what it’s worth, I have used both adjustable mounts and angled mounts, and there are circumstances where I regard one or the other as very much essential. But for the common scenario where a bit of elevation is needed on a PCP, shimming—done sensibly—is a quick and effective solution that sacrifices nothing.
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I like bullpups and especially P35s. Many bullpups have one piece picatinny rails and it is super easy to put a shim made of layers of soda can under the rear rail mounting point. This does not stress the scope at all. But it would be no better than a shim inside the ring if the gun has a two piece rail. I shim the rail just to get more elevation adjustment. No real down side.
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