On all my scopes. Athlon, Vortex, Hawke, Leupold. When shooting the pellet arcs up and to the left and then back down to the right to the POA. I would expect to see it arc up and then down in a straight vertical drop. Shooting 50, 75 and 100 yards is always the same with the added hold over, but I can see it pull to the left and back to the right. It's the exact same on different guns also. It's weird. Can't explain what I'm seeing. POA and POI are the same. This is with no wind. With wind it's just more pronounced. Is this some weird optical illusion maybe caused by my glasses? Sylvan
Question for scope wizards
- Thread starter Kitplanenut
- Start date
wow, how can you hit anything with that? i guess you just shoot one distance where you are zeroed then. what barrel type is it, wondering also if you are not pulling moving the gun/scope. the later can be corrected LOL
try better follow through, or clamp the gun down. to see if it is you moving the scope
does not sound like a straight shooter. that gun is it. what make?
try better follow through, or clamp the gun down. to see if it is you moving the scope
does not sound like a straight shooter. that gun is it. what make?
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G
Guest
Guest
Are you always facing the sun in the same direction when you notice this? As in if it is on your left, or right you might get some visual aberration caused by the pellet being lit on one side and shaded on the other. It could also be cant but then you would notice the poi continuing to move left or right as the distance increases. Another test would be to record the pellets in flight and check them that way.
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I believe if you are accurate at all your distances then what you are seeing is an illusion. Maybe because you are focused at say 100 yards... 50 60 70 will be a tad bit blurry or out of focus making you think it is moving sideways. Same as when you look through a magnifying glass and you slowly move it over objects. If you are not perfectly centered, the objects stretch and pull to the edges.
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I have noticed same thing occasionally. Have you ever investigated barrel indexing? Basically no barrel is straight and if you shot a group at say 30m and could turn your barrel in the breach 90 degrees between 4 shots you would end up with a circle.
The smaller the circle the straighter your barrel.
But even with the best barrels there will be a circle.
Ideally you would position your barrel at 12 or 6 o'clock and so would eliminate a certain degree of horizontal dispersion in your groups.
I wonder if what your seeing is this horizontal movement caused by a barrel that isn't indexed at 12 or 6 o'clock.
Michael
The smaller the circle the straighter your barrel.
But even with the best barrels there will be a circle.
Ideally you would position your barrel at 12 or 6 o'clock and so would eliminate a certain degree of horizontal dispersion in your groups.
I wonder if what your seeing is this horizontal movement caused by a barrel that isn't indexed at 12 or 6 o'clock.
Michael
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It's not cant. Scopes, guns and level's are set up with a Wheeler level set. Guns are FX, Airforce, Crossman and FWB so all kinds of barrels. Gun can be sandbagged or in a sled. Doesn't make a difference where the sun is, but with it to my back the pellet is more visible. This has no affect on accuracy. It's like watching your pellet in a wind being blown to the side but then it curves back. I'm thinking it has to have something to do with my glasses. That or getting old. maybe the peyote. Sylvan
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agree with john ,your best chance of figuring it out would be to record the flight of the pellet ,,imo i tend to think its your eyes playing tricks , i never ever read of this before today good luck.
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Sylvan I copied this off another forum. It's a post a way down the tread but it is all interesting stuff.
The link to the entire tread is at the bottom.
hope this helps also... after zeroing in the rifle at lets say 55 yards..and i find that theres a shift of poi at 75.. one thing i find also is to shoot when the sun is at the back .where one can see the pellets flight.. i index till i get to see the pellets travel/flight are mostly or most of the time aligned with the vertical of the crosshair.. the rifle should be firmly rested
https://www.gatewaytoairguns.org/GTA/index.php?topic=52432.0
Michael
The link to the entire tread is at the bottom.
hope this helps also... after zeroing in the rifle at lets say 55 yards..and i find that theres a shift of poi at 75.. one thing i find also is to shoot when the sun is at the back .where one can see the pellets flight.. i index till i get to see the pellets travel/flight are mostly or most of the time aligned with the vertical of the crosshair.. the rifle should be firmly rested
https://www.gatewaytoairguns.org/GTA/index.php?topic=52432.0
Michael
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AirSupply. Thanks. Makes for some interesting reading. I really enjoy learning new stuff. Been seeing this for years but it hasn't affected my accuracy so never really looked into it. Just for comparison dug out a pair of my old prescription glasses a couple of prescription changes ago. They definitely change the arc that I'm seeing. So what I'm seeing is definitely related to my glasses. Sylvan
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I was going to say maybe you are seeing better than the average shooter to pick that up.
I can't read without glasses but seems crystal clear without them through the scop.
Anyway as long as it ends up where it should be that's what counts.
I can't read without glasses but seems crystal clear without them through the scop.
Anyway as long as it ends up where it should be that's what counts.
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