Parallax wheel

[J E Custom]

The one on my scope (2.5-15, MOA) was about that large. I have no idea why airgunners use them?

They are for shorter distances and must be focused at all times so a finer adjustments are necessary. Some even place markings on the wheel so they can shoot different distances with prefect focus. They also have a different recoil reaction because of the spring action an adjustments have to be positive.

J E CUSTOM

 

[jimisbell]

So you would recommend removing them for LRS?

 

[Brother Buckwheat]

The large wheel for parallax on an airgun is for marking yardage. When shooting Field Target competition the use of rangefinders is not allowed, the parallax focus will give you the yardage, the larger the wheel, the more precise the yardage.
To drop the silhouette target you must shoot through the hole in the silhouette that is from 3/8" to 1" at varying distances between 10 to 55 yards. Thus knowing the "exact" yardage and trajectory of your projectile is necessary.
For LR PB shooting there really is no need to use a large wheel, especially if the distance is known.

 

[jimisbell]

Guess mine is coming off. Its ugly. And it bumps things.....

 

[shootski]

I'm here to solve the mystery of the oversized Parallax Wheel!
Airgunners use it to range find mostly for Field Target. When you have targets that have Kill Zones that are under 1/2" at 40+ yards you need to know your range down to inches because the .177 at or under a typical rules driven maximum of 20FPE. Pellets start to drop like rocks at those ranges. On the big wheel you use a custom printed tape with your distances read at a fixed index mark, you turn the wheel to eliminate all Parallax and then read the tape for your range. You then have your holdover or under; or you have a table of elevation settings if you are a "Knob Twiddler" instead!

Probably clear as mud! Hopefully not....

shootski

 

[jimisbell]

Thank you. Makes sense if you are an air gunner.

 

[George Dean]

I recently got one of D. Holland's rifle scopes. It had a large parallax wheel (not That large). Stated it was for air guns - but was easily removed. Took the wheel off and now the scope and parallel knob is "normal". Still easy to turn and shoots well on a 7mm RUM.
Surely looked goofy at first!

Hmmm, an air-gun scope on a 7mm rifle. Are they not specifically built to survive the recoil of the weapon they're designed for? Air rifles & firearms have opposing recoils.

 

[jimisbell]

I think he meant to say the wheel was for airguns, not the scope. Also, I dont see that air guns and firearms have"opposing" recoil. They BOTH recoil against your shoulder. I would hate to have any weapon that recoiled away from me. That would be very scary. My scope came with a large wheel AND it also said it could handle 50 Cal.

 

[Brother Buckwheat]

A spring-piston airgun recoils both ways, that is what messes scopes up if they are not rated for airguns.

 

[Tommo64]

I have an Optisan EVX 5-20x50 scope that came with one. I've never used it. In fact, seeing that all of my rifles are left handers I couldn't even if I wanted to as the wheel impedes the smooth ejection of the spent cartridge from the ejection port.

 

[GLTaylor]

I think he meant to say the wheel was for airguns, not the scope. Also, I dont see that air guns and firearms have"opposing" recoil. They BOTH recoil against your shoulder. I would hate to have any weapon that recoiled away from me. That would be very scary. My scope came with a large wheel AND it also said it could handle 50 Cal.

You're right. The scope I got from Darryl Holland is a center fire scope with ranging capabilities built in. It came with the large parallex wheel, which I took off. Works fine with 7 RUM to 400, which is far as I can shoot.