Facing an issue with scopes

[Doflamingo]

Hello everyone
I hope all of doing great
I have Diana chaser rifle kit it's awesome gun accurate and lightweight but I have an issue with scopes
The thing is no matter what scope I used  same thing happened ( I don't the problem is my gun or just me 🤔) okay so I have 4x20 scope you know the light ones that also cheap as well also I have borrowed my brother scope ( hawke 3-9x40) also I bought new victo 2-6x32 scope
All three scope the same thing happened
What happened is when I shoot from 10 m I adjust the scope on bullseye and I hit the target very well like 4 pellets within (1/2 or 3/4 in) but when I move further and shoot from 20 m the pellet hit above the target about 3.5 inches !!!!! Also at this distance the pellet group is good as well ( about 1 inch 3 pellets) but as I said it goes higher And as I told you this thing happened with all 3 scopes
In my knowledge the pellet should goes lower as the distance is farther but what I am experiencing here the pellet go higher!!???

So what I missing here?

[Doflamingo]

Hello everyone
I hope all of doing great
I have Diana chaser rifle kit it's awesome gun accurate and lightweight but I have an issue with scopes
The thing is no matter what scope I used  same thing happened ( I don't the problem is my gun or just me 🤔) okay so I have 4x20 scope you know the light ones that also cheap as well also I have borrowed my brother scope ( hawke 3-9x40) also I bought new victo 2-6x32 scope
All three scope the same thing happened
What happened is when I shoot from 10 m I adjust the scope on bullseye and I hit the target very well like 4 pellets within (1/2 or 3/4 in) but when I move further and shoot from 20 m the pellet hit above the target about 3.5 inches !!!!! Also at this distance the pellet group is good as well ( about 1 inch 3 pellets) but as I said it goes higher also I moved further a little bit like 6 meters (26 M total distance ) and also pellet goes higher!! And as I told you this thing happened with all 3 scopes
In my knowledge the pellet should goes lower as the distance is farther but what I am experiencing here the pellet go higher!!???

So what I missing here?

[Tater]

The scope sits higher than the center bore of the muzzle, and at 10 yards you are zeroed in at the first place the your line of sight hits the path of the pellet. The pellet leaves the muzzle below your line of sight and continues upward until gravity brings it back into your line of sight again. There is a near and far zero and you are sighted in at the near zero. If you try shooting at 30 or 40 yards you should see the point of impact drop back down again.
Hopefully someone else can give you a clearer explanation then me. There are diagrams that would help too, I'll try to find one.

Edit: The bottom example shows it pretty well except the 50 yards in the pic is your 10 yards.

[Doflamingo]

The scope sits higher than the center bore of the muzzle, and at 10 yards you are zeroed in at the first place the your line of sight hits the path of the pellet. The pellet leaves the muzzle below your line of sight and continues upward until gravity brings it back into your line of sight again. There is a near and far zero and you are sighted in at the near zero. If you try shooting at 30 or 40 yards you should see the point of impact drop back down again.
Hopefully someone else can give you a clearer explanation then me. There are diagrams that would help too, I'll try to find one.

Edit: The bottom example shows it pretty well except the 50 yards in the pic is your 10 yards.

Thanks for your explanation
The diagram helps a lot 👍 so what you advise me? Should I put low scope mount  ? Or any suggestions

[Tater]

Lower scope mounts would probably help, but if you have a chrony you can use chairgun or one of the other ballistic apps out there and use the mildots on the scope for various ranges.

[Jshooter71]

Hani, like Tater said, you need to find the apex of the trajectory of your pellet’s point of impact (POI). Since your Diana Chaser did the same thing with different scopes, the rifle and your pellet choice is at least consistent, that’s a good thing. If you don’t have a chronograph and trajectory software, you can just keep shooting groups at further distances. Say, from 10 meters out to 60 meters, if that’s available to you, in 5 or 10 meter increments. You’ll find where the pellet comes back down and hits the bullseye again. Typically, if you’re going to shoot varying distances with an airgun, you would zero your scope for the apex of that curve, say 30 meters. From there, you could use holdover or hold under to correct for your hold from zero, once you understand where the POI is at the other distances. Here’s a link to another GTA thread on “what distance do you zero your airguns for?” : https://www.gatewaytoairguns.org/GTA/index.php?topic=184465.0

[Doflamingo]

Thanks all of you guys
Tater
JShooter 71
Yes I have chrony
My chaser with 8.5gr pellet 4.5mm 670 FPS with rifle barrel and 570fps with pistol barrel

[Jshooter71]

Thanks all of you guys
Tater
JShooter 71
Yes I have chrony
My chaser with 8.5gr pellet 4.5mm 670 FPS with rifle barrel and 570fps with pistol barrel

Sounds good, Hani. You might try a 20 meter zero and see what groups you get at 10m, 15m, 20m (Zero), 25m and 30m, etc.

[avator]

I always use the lowest mounts possible when mounting scopes. Clearing mags is the biggest consideration.  A bore laser is also a handy tool.

https://www.amazon.com/22-caliber-bore-sighter/s?k=22+caliber+bore+sighter

[Doflamingo]

Thanks all of you guys
Tater
JShooter 71
Yes I have chrony
My chaser with 8.5gr pellet 4.5mm 670 FPS with rifle barrel and 570fps with pistol barrel

Sounds good, Hani. You might try a 20 meter zero and see what groups you get at 10m, 15m, 20m (Zero), 25m and 30m, etc.

Yeah that would be the best solution

[Doflamingo]

I always use the lowest mounts possible when mounting scopes. Clearing mags is the biggest consideration.  A bore laser is also a handy tool.

I see those things but believe or not I never tried it,, I should test it I think I'm going to buy one instead of wasting pellet 😁😁 and yeah that's why I am using high mounts because of the mag so Im between 2 matters

[Back_Roads]

 Good ole Ted has some very informational videos on the subject.

[Doflamingo]

Good ole Ted has some very informational videos on the subject.

Thanks sir that was very helpful video
Really useful
So I got it the space between the barrel and the scope for example as in the video is 2 in so the pellet will going 2in up every 13yd ,
but why every 13 yd ? And he said 800 -900 FPS rifles but my Diana chaser barley hit 650FPS

[Back_Roads]

 This Chairgun APP will help you figure out ballistics for slower or faster speeds.
https://play.google.com/store/apps/details?id=com.hawke.chairgun&hl=en_US&gl=US

[Thauglor]

What exactly are you trying to fix? There is nothing wrong here, instead you will just turn the knobs the other way when going from 10 to 20m

[nced]

Hello everyone
I hope all of doing great
I have Diana chaser rifle kit it's awesome gun accurate and lightweight but I have an issue with scopes
The thing is no matter what scope I used  same thing happened ( I don't the problem is my gun or just me 🤔) okay so I have 4x20 scope you know the light ones that also cheap as well also I have borrowed my brother scope ( hawke 3-9x40) also I bought new victo 2-6x32 scope
All three scope the same thing happened
What happened is when I shoot from 10 m I adjust the scope on bullseye and I hit the target very well like 4 pellets within (1/2 or 3/4 in) but when I move further and shoot from 20 m the pellet hit above the target about 3.5 inches !!!!! Also at this distance the pellet group is good as well ( about 1 inch 3 pellets) but as I said it goes higher And as I told you this thing happened with all 3 scopes
In my knowledge the pellet should goes lower as the distance is farther but what I am experiencing here the pellet go higher!!???

So what I missing here?

This sketch shows what other replies have shown, basically the gun is tilted up if the zero is at 10 yards (1st) zero, then the pellet sails above the zero at further distance till the pellet falls to the 2nd zero, and the pellet continues to fall past the 2nd zero IF the gun is shooting "on the level"...............


I purposely sight in my springers at or within about 1/8" of the apex of the pellet flight, then I only need to "hold over" at all distances closer or further than my zero (LOL, that way I don't need to also remember "hold under".........
When I used a .177 R9 with 7.9 grain CPLs at 900ish fps using a 4-16x40 Bushnell Elite 4200 I found that a I had a near zero at 16 and far zero at 50 yards. When practicing at my brother's place for field target we would shoot targets from 10 yards to 55 yards using only "hold on" or "hold over" using symbols marked on pvc tape stuck to my AO............


Most ft marked their AO or side wheel with actual "sharp focus distances" and referred to a "dope sheet" to know how many clicks up or down to set the scope for each shot...........

Since I only shot hunter class field target "clicking on" wasn't allowed so all aiming was done using "hold over or hold under", plus my brother and I would hunt squirrels in the West Virginia woods using our .177 R9s we continued using only holdover for practice. Also, we would stalk within our "near/far distance zero" so there was no need for using a "cheat sheet" to be within a "minute of squirrel head" accuracy. LOL, at this distance most squirrels wouldn't give us the time to consult a "cheat seat" and "clicking on" before they scrambled away!

We used to shoot at field target course outside Harrisonburg, Va  that ft range would occasionally arrange pest control shoots at local farms. My brother and I attended one of those pest control shoots and at the end of the day there were bunches of starlings and English sparrows taken by the half dozen THAGC members that attended. My brother and I took over 1/2 of them using holdover. LOL, one of the attendees using his high zoot field target rig and dope sheet told us that he would set up to take a shot and see a puff of feathers through his scope where my brother or I already hit the bird by simply using holdover.

Anywhoo, the first task in setting up you scope is to shoot a target from 10 yards to about 50 yards and shoot several pellets at a bull from each distance using your preferred zero. Years ago I made up this target using a CAD program................

Here is the result of my shooting 5 CPLs at each bull using my 30 yard zero. I wasn't oo concerned about the tightness of the groups, only an approximation of the needed holdover at each range.......