Scope? Ammo? Rifle?

[seangabrell]

Not sure where to post this, so I’ll start here and see where it goes. Most of my rifles are zeroed at 30 yards. At 20-25 POI will be say 1/2”ish left, 40-50 POI will be 3/4” to 1”ish right. Now this is on a few different rifles, all with their own scopes, different caliber, different pellet weights. Some start left and go right. Some opposite. They are all springers. Can a pellet curve that much in a short distance?

 

[bubblerboy64]

Can we rule out wind and parallax ? If so it might be the hold you are applying to the rifle.
your follow thru will tell at greater distances. Shooting air guns especially springer is challenging 

 

[GLPalinkas]

One thing to try: No disrespect intended but I would suspect your scope mounting methods. It sounds like the scopes (all of them) are being leveled incorrectly and you are inducing rifle cant which could produce the results you are describing. When mounting a scope, it's critical to make sure the rifle action and the scope are leveled with each other. Again, no offense but I don't know your level of expertise in these matters. Here are some links that might be helpful:

https://www.pyramydair.com/blog/2020/09/how-to-mount-a-scope-part-1/

https://www.accurateshooter.com/optics/canting-effect-on-point-of-impact/

Hope these help.

Gary
Venice, FL

 

[Glenroiland]

I have personally been neglectful of correct scope mounting, and as discussed above boy it can matter especially past 20 yards. Also technique and follow through....see posts above.

 

[seangabrell]

One thing to try: No disrespect intended but I would suspect your scope mounting methods. It sounds like the scopes (all of them) are being leveled incorrectly and you are inducing rifle cant which could produce the results you are describing. When mounting a scope, it's critical to make sure the rifle action and the scope are leveled with each other. Again, no offense but I don't know your level of expertise in these matters. Here are some links that might be helpful:

https://www.pyramydair.com/blog/2020/09/how-to-mount-a-scope-part-1/

https://www.accurateshooter.com/optics/canting-effect-on-point-of-impact/

Hope these help.

Gary
Venice, FL

No disrespect taken. All scopes installed with a leveling kit. I will be looking into the canting. Appreciate the response and the links

 

[GLPalinkas]

OK great Sean. Since you used a leveling kit maybe this cross check from one of our Field Target shooters, Keith Knoblock (AKA Knobs) will help.

"Place a target out at 10 -15 yards indoors. draw a line on it that is perfectly plumb and put a small dot in the middle of the line. Now shoot at the dot with the scope elevation full up and full down. While doing this hold the vertical line on your reticle in exact alignment with the plumb line you drew on the target.

If your groups fall on the plumb line, you're properly leveled. If not, rotate your scope to correct.

Once you're set up, put a bubble level on the scope tube and level it with your vertical reticle crosshair on the plumb line.

Then believe your bubble level. Your brain will adjust."

Here is a scope cant analysis, also courtesy of one of our best FT Shooters, Scott Hull (AKA Scotchmo):

 

[Odoyle]

Mount bubble levels permanently on all of your guns scopes and or rails. That should fix your apparent cant problem.

 

[Odoyle]

 

Be sure to level the bubble level to the gun!

 

[scratchcoobster]

If can’t is not the problem, then it looks like a parallax issue. Your line of sight is not inline with the scope, you’re looking through the scope at an angle, or your side focus is not adjusted properly.

 

[Odoyle]

If its a parallax issue then change your scopes to this one.

Very minimal parallax adjustment needed just adjust side focus to 40 or 50 yards then just shoot it's all clear throughout a wide range of yardage no need to keep adjusting parallax side focus wheel.

I really like this one especially for hunting no need to fiddle with the side focus its clear within + / - 40 yards.

Don't buy from Crosman it's only for retail price reference. EBay is the cheapest I have ever seen this $105 typically priced scope elsewhere.

It's like a Vortex Crossfire2 with a side focus instead at less than half the price and with a lifetime warranty too.

https://www.ebay.com/p/19011763482

 

[seangabrell]

Thanks for all the replies and help. Will recheck all the scopes and do the line test. 

 

[GoldenStateAIRGUNer]

The issue can also be attributed to either the dovetail groove or rail on the receiver not being in perfect alignment with the bore. A problem probably more of a issue with a break barrel rifle. If a welded scope rail ( like on my Sig ASP20) wasn't welded exactly in line with the barrels bore POI changes will occur at different distances. About all one can do is zero the scope and use shims to counter the problem.

 

[bandg]

The issue can also be attributed to either the dovetail groove or rail on the receiver not being in perfect alignment with the bore. A problem probably more of a issue with a break barrel rifle. If a welded scope rail ( like on my Sig ASP20) wasn't welded exactly in line with the barrels bore POI changes will occur at different distances. About all one can do is zero the scope and use shims to counter the problem.

Good quality windage adjustable rings can easily correct such a condition, unless it is so bad as to be absurd.

 

[GoldenStateAIRGUNer]

The issue can also be attributed to either the dovetail groove or rail on the receiver not being in perfect alignment with the bore. A problem probably more of a issue with a break barrel rifle. If a welded scope rail ( like on my Sig ASP20) wasn't welded exactly in line with the barrels bore POI changes will occur at different distances. About all one can do is zero the scope and use shims to counter the problem.

Good quality windage adjustable rings can easily correct such a condition, unless it is so bad as to be absurd.

True ! You have any brands in particular? 

 

[bandg]

I have multiple sets of fully adjustable Sportsmatch rings and they have proven totally reliable on rifles up to a Diana 460. They are finely adjustable using the screws for both windage and elevation changes-no relying on pushing or pulling for adjustment so it can be controlled very well. But they are expensive. Others have mentioned Sun Optics fully adjustable rings and I may try to find a set of those to try as well. I have one set of FX elevation adjustable rings that work well and no experience with Eagle Vision.

 

[GoldenStateAIRGUNer]

Wonder if they are available for picatinny base ? Do they hld adjustment? 

 

[bandg]

Wonder if they are available for picatinny base ? Do they hld adjustment?

See Diana 460 notation above-they hold adjustment. I believe they are available in Picatinny.

 

[GoldenStateAIRGUNer]

Wonder if they are available for picatinny base ? Do they hld adjustment?

See Diana 460 notation above-they hold adjustment. I believe they are available in Picatinny.

Thx ! It seems all my break barrels have this issue. I know it's not a parallax issue as they will all group nicely. Just different POI's at different distances.

 

[GoldenStateAIRGUNer]

Another question. Can they be adjusted with scope mounted ?

 

[bandg]

Another question. Can they be adjusted with scope mounted ?

All adjustment and locking screws are easy to reach from the sides on the SM rings. I believe the Sun Optics rings require either removal of scope from rings or removal of base from rifle to adjust elevation since the base has to be screwed up or down. Not certain how this affects windage adjustment as I don't have any SO rings yet (recently ordered a couple of sets to try but they have not shipped).