GTA
All Springer/NP/PCP Air Gun Discussion General => Air Gun Gate => Topic started by: zdc1775 on March 03, 2013, 02:43:51 PM
-
Ok, so I am completely new to air rifles but just bought a Crossman Venom Nitro .22. I was sighting it in and had to shim the scope to get it even close on elevation. I eventually used four layers of beer can to get it to where POI and POA was the same at 10 yards. I don't want to leave it shimmed that much so I have been looking for an adjustable scope mount or adjustable rings. I have a 1" tube scope and weaver bases. In searching I have been unable to find anything that fits weaver bases they all fit 11mm or 14mm dovetail. Any help would be greatly appreciated.
-
The Hawke 17021S fits the 11 mm Dovetail to Weaver rail base and is adjustable.
It has a lot of adjustment and you can zero in your system to the point where only a few
clicks of the scope turret will be required to be dead on.
http://www.airgunsofarizona.com/Hawke/Accessories.htm (http://www.airgunsofarizona.com/Hawke/Accessories.htm)
It is available here under the Scopes/Hawke/Accessories link
http://www.airgunsofarizona.com/ (http://www.airgunsofarizona.com/)
and also at other dealers.
-
The Hawke 17021S fits the 11 mm Dovetail to Weaver rail base and is adjustable.
It has a lot of adjustment and you can zero in your system to the point where only a few
clicks of the scope turret will be required to be dead on.
It is available here under the Scopes/Hawke/Accessories link
and also at other dealers.
Not exactly what I was asking for but thanks.
To clarify the rifle came from the factory with weaver bases so I need an adjustable scope mount that will attach to a weaver rail. If it comes to replacing the base I will just buy a 20 moa base to use.
-
Ooops. Misunderstood. You might try the Burris Signature Zee Rings with offset inserts.
http://www.burrisoptics.com/sigrings1.html#2 (http://www.burrisoptics.com/sigrings1.html#2)
They are for Weaver bases and have offset insert rings that allow you to adjust for both windage and elevation.
They are available from places like MidwayUSA.com and other optics suppliers.
-
This is what you have?
CenterPoint Optics 3-9x32 scope with quick-lock mounting system
(http://ep.yimg.com/ca/I/airgundepot_2248_12968672)
There is no parallax adjustment with that scope, probably set at 50 yds or more.
Are POI's consistent?
Are you using 3X or 9X? Try 3X, parallax will be worse at 9X.
-
This is what you have?
CenterPoint Optics 3-9x32 scope with quick-lock mounting system
(http://ep.yimg.com/ca/I/airgundepot_2248_12968672)
There is no parallax adjustment with that scope, probably set at 50 yds or more.
Are POI's consistent?
Are you using 3X or 9X? Try 3X, parallax will be worse at 9X.
The scope is fine. Shooting approximately 1/2" ten round groups at 10 yards with aproximately 150 pellets fired. Also if you remove the end cap you can adjust the parallax so that it is clear at most ranges. Same as any other scope. I am new to air guns not guns in general. No offense.
Will be updating the scope in the future but want to see what the rifle can really do.
-
I take it 10 yards is all you have to work with.
25 yards would be a better zero, and would not require that much shimming, of the scope.
An adjustable scope mount is still nice.
-
The scope is fine. Shooting approximately 1/2" ten round groups at 10 yards with aproximately 150 pellets fired. Also if you remove the end cap you can adjust the parallax so that it is clear at most ranges. Same as any other scope. I am new to air guns not guns in general. No offense.
Will be updating the scope in the future but want to see what the rifle can really do.
None taken. I assume POI is much lower than POA? If so, are you running out of elevation adjustment?
If it won't zero, either too much droop in the barrel or the scope is bad. Try a different scope. No sense trying to compensate for a bad gun or scope.
-
I take it 10 yards is all you have to work with.
25 yards would be a better zero, and would not require that much shimming, of the scope.
An adjustable scope mount is still nice.
No I have close to 100 yards out my back door, and close to 250 if I shoot from the front yard. I'm not really sure how shooting at a longer range will require less shimming however I will try it.
None taken. I assume POI is much lower than POA? If so, are you running out of elevation adjustment?
If it won't zero, either too much droop in the barrel or the scope is bad. Try a different scope. No sense trying to compensate for a bad gun or scope.
About 3" with the scope about 3/4 of the way adjusted.
Also I'm not chasing a zero now that it is shimmed it shoots very consistently to the POA.
-
When I have a chance I will shoot a few groups and post the results.
-
they do make adjustable mounts, but they aren't cheap...
https://www.pyramydair.com/product/beeman-5039-1-pc-adjustable-mount-w-1-rings-high-9-5-11mm-dovetail?a=1932 (https://www.pyramydair.com/product/beeman-5039-1-pc-adjustable-mount-w-1-rings-high-9-5-11mm-dovetail?a=1932)
or something with a fixed compensation for less money...
https://www.pyramydair.com/product/utg-drooper-scope-rail-11mm-to-weaver-adapter-compensates-for-droop?a=4191 (https://www.pyramydair.com/product/utg-drooper-scope-rail-11mm-to-weaver-adapter-compensates-for-droop?a=4191)
kgb
-
...About 3" with the scope about 3/4 of the way adjusted.
Also I'm not chasing a zero now that it is shimmed it shoots very consistently to the POA.
You said that you don't like the way it's shimmed, i.e. 4-layers of beer can.
I saw a video recently, where they used 2-layers.
Found this: The fact is that most of today's spring-piston air rifles point down to some extent. If the angle is small, you can correct it with the scope adjustments. If it's large, you need an adjustable scope mount.
https://www.pyramydair.com/blog/2006/01/barrel-droop/ (https://www.pyramydair.com/blog/2006/01/barrel-droop/)
Unfortunately, all the compensator mounts are dovetail & yours is Picatinny/Weaver. That leaves adjustable rings which are expensive.
-
You said that you don't like the way it's shimmed, i.e. 4-layers of beer can.
I saw a video recently, where they used 2-layers.
Found this: The fact is that most of today's spring-piston air rifles point down to some extent. If the angle is small, you can correct it with the scope adjustments. If it's large, you need an adjustable scope mount.
I worked up to four layers. I could probably get away with three but that will leave little to no adjustment left.
Unfortunately, all the compensator mounts are dovetail & yours is Picatinny/Weaver. That leaves adjustable rings which are expensive.
That's what I was afraid of.
-
I run the B Square adjustable mounts on one of my rifles. I think they work better than using shims since the rings will be in alignment with the scope tube so you won't have to worry about putting a kink in it if you need to use 4 layers of beer can. ;)
I think they make em for all kinds of rails.
Here's a quick review on them...
https://www.pyramydair.com/blog/2007/07/b-square-adjustable-scope-mounts-part-3/ (https://www.pyramydair.com/blog/2007/07/b-square-adjustable-scope-mounts-part-3/)
Cheers!
-
...
Here's a quick review on them...
https://www.pyramydair.com/blog/2007/07/b-square-adjustable-scope-mounts-part-3/ (https://www.pyramydair.com/blog/2007/07/b-square-adjustable-scope-mounts-part-3/)
...
They have a dovetail base, which won't work for him.
(https://www.pyramydair.com/blog/images/aa-mount-web.jpg)
-
...
Here's a quick review on them...
https://www.pyramydair.com/blog/2007/07/b-square-adjustable-scope-mounts-part-3/ (https://www.pyramydair.com/blog/2007/07/b-square-adjustable-scope-mounts-part-3/)
...
They have a dovetail base, which won't work for him.
Since then, I think they made them available.
http://www.straightshooters.com/b-17420-1-piece-adjustable-mount.html (http://www.straightshooters.com/b-17420-1-piece-adjustable-mount.html)
Adjustable 1 Piece High 1" (Rings) Weaver (Base) Mount
(http://www.straightshooters.com/images/P/B2-17420.jpg)
-
If you can calculate the angle needed. You could use a small drum sander or a wooden dowel with sandpaper to cut an angle versus shims. You may need a caliper to measure the front to back height of the ring to achieve the right angle. Just remember the rings are about 4'' apart when calculating your angled heights of the rings.
-
The best option with a Weaver rail airgun is the Burris Signature rings with the offset inserts.The adjustable mounts I have tried typically won't hold zero on magnum airgun.
-
The best option with a Weaver rail airgun is the Burris Signature rings with the offset inserts.The adjustable mounts I have tried typically won't hold zero on magnum airgun.
Excellent suggestion.
http://www.burrisoptics.com/sigrings1.html#2 (http://www.burrisoptics.com/sigrings1.html#2)
(http://www.burrisoptics.com/images/sigrings2_01.jpg)
About $60 with 3 different inserts.
http://www.opticsplanet.com/burris-zee-signature-1-rifle-scope-mount-rings-for-weaver-style-bases.html (http://www.opticsplanet.com/burris-zee-signature-1-rifle-scope-mount-rings-for-weaver-style-bases.html)
-
The best option with a Weaver rail airgun is the Burris Signature rings with the offset inserts.The adjustable mounts I have tried typically won't hold zero on magnum airgun.
This is what I will be doing.
Thanks for all the help guys.
-
Ooops. Misunderstood. You might try the Burris Signature Zee Rings with offset inserts.
http://www.burrisoptics.com/sigrings1.html#2 (http://www.burrisoptics.com/sigrings1.html#2)
They are for Weaver bases and have offset insert rings that allow you to adjust for both windage and elevation.
They are available from places like MidwayUSA.com and other optics suppliers.
For what you have and what you need, the Burris rings are the only way to go. I had your problem once and used these rings and they are the cat's meow for scope realignment for barrel droop, etc.
Have you considered just returning the rifle and getting a replacement or sending it to Crosman for adjustment or repair? I have had 3 Venoms and they have all been perfect but I know that Crosman stands hard behind their products if there is a problem like this..