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Question for those knowledgeable in guns
self | 11/26/2012 | learner

Posted on 11/26/2012 11:17:41 AM PST by learner

I purchased a powerful pellet gun for my sister and we sighted in for the correct distance. However the location of the scope will be different for her than it was for me as she is shorter and the scope needs to be more to the rear for her. Will this affect the sighting in or is it the same regardless of the location of the scope? Thanks for your help


TOPICS: Your Opinion/Questions
KEYWORDS: banglist; sightinginascope; vanity

1 posted on 11/26/2012 11:17:45 AM PST by learner
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To: learner

You’re Gonna Shoot Yer Eye Out Kid!


2 posted on 11/26/2012 11:19:44 AM PST by TexasCajun
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To: learner

Yes, you should re-sight.


3 posted on 11/26/2012 11:20:07 AM PST by Obadiah (It pays to be a Democrat.)
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To: learner

If you move the scope on the gun, what zeroing in you did will be useless.


4 posted on 11/26/2012 11:21:36 AM PST by KoRn (Department of Homeland Security, Certified - "Right Wing Extremist")
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To: learner

You will need to re-sight the scope. I’m not sure how accurate or at what distance you are sighting it. But the location of the scope combined with any magnification it has affects it’s sight. Moving it a 1/4 of an inch could affect the accuracy by an inch or two depending on the FPS and the distance you are sighted to.

Beyond that, simply removing it and re-placing it makes it prone to inaccuracies (again, depending on how accurate you are trying to make it).


5 posted on 11/26/2012 11:21:36 AM PST by Tenacious 1 (The Click-&-Paste Media exists & works in Utopia, riding unicorns & sniffing pixy dust.)
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To: learner

It’ll be close. Move it to the rear by loosening the screws just enough to allow the movement. Then have her test it and make final adjustments.


6 posted on 11/26/2012 11:22:04 AM PST by 'smith
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To: learner
Scopes have an attribute called, "Holding Zero"
Any time an optic is removed and then replaced on a weapon, even if reposition to the same place (in the case of a rail). Some scopes will retain their zero better than others.

In your case, the very act of moving the scope on the mount will require re-zeroing or verifying zero.

7 posted on 11/26/2012 11:22:24 AM PST by grobdriver
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To: learner

Yes, move it and have her sight it in with your help.


8 posted on 11/26/2012 11:25:03 AM PST by Randy Larsen (Aim small, Miss small.)
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To: learner

It may or may not. Any movement in the scope mount can change alignment. You should be able to find a location which works for everyone.


9 posted on 11/26/2012 11:31:01 AM PST by SWAMPSNIPER (The Second Amendment,a Matter of Fact,Not a Matter of Opinion)
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To: learner

If you are talking about sliding the scope fore and aft to change eye relief, then the change in point of impact should not be huge. After all, you are moving along the same axis as the bore, not lateral to it. Changing mounts and moving the scope up or down will have a major effect though.


10 posted on 11/26/2012 11:31:02 AM PST by doorgunner69
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To: learner

Is the rifle a springer or pneumatic? If it is a pneumatic the type of scope is not important.

If it is a springer it has to have a scope designed to withstand the back and forth recoil. If the scope came with the airgun as a package it probably is the right type of scope.

Odd as it sounds, a powerful springer air gun will destroy a regular scope fairly quickly tho the recoil is far less than a high powered powder burner.


11 posted on 11/26/2012 11:34:06 AM PST by yarddog (One shot one miss.)
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To: learner

Scopes have an eye relief distance. Ideally, the eye relief should be adjusted per shooter. Practically, a shooter can be trained how to use a longer eye relief.

The operative function is the alignment known as ring in ring. As you move back from a scope, there will form a black ring around the view field. That black ring should be centered (equal thickness of black ring all the away around) on the exterior rim of the scope. This will more likely be an issue for the shorter person. Once the ring in ring is centered, then the remaining sight picture can be developed. This of course takes practice.

IF she can adapt to the longer eye relief, you can set the eye relief for you and not adjust the scope position.


12 posted on 11/26/2012 11:34:51 AM PST by taxcontrol
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To: learner

Put a removable butt pad on it. Zero it for yourself with the butt pad in place. Remove the butt pad when your sister uses it.


13 posted on 11/26/2012 11:45:07 AM PST by ltc8k6
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To: learner

If it is just an eye relief issue, you can try the following.

Sight the air rifle for the person who needs to be closest to the scope. Fit a slip-on recoil pad which increases the length of the butt stock, thus increasing eye relief, whenever the second person wants to shoot the air rifle.

http://www.cabelas.com/product/Pachmayr-Decelerator174-Slip-On-Recoil-Pads/741408.uts?Ntk=AllProducts&searchPath=%2Fcatalog%2Fsearch.cmd%3Fform_state%3DsearchForm%26N%3D0%26fsch%3Dtrue%26Ntk%3DAllProducts%26Ntt%3Drecoil%2Bpad&Ntt=recoil+pad&WTz_l=Unknown


14 posted on 11/26/2012 11:56:27 AM PST by Sergio (An object at rest cannot be stopped! - The Evil Midnight Bomber What Bombs at Midnight)
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To: ltc8k6

D’oh! Ya beat me to it.


15 posted on 11/26/2012 11:58:06 AM PST by Sergio (An object at rest cannot be stopped! - The Evil Midnight Bomber What Bombs at Midnight)
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To: learner; Sergio; ltc8k6; taxcontrol
I agree with Sergio & ltc: the way to do this is to have an add-on butt pad for the other shooter. Another way, which taxcontrol mentioned, is to just train the shooter to use the longer eye relief. This depends a lot on the exit pupil measurement of the scope; with cheaper scopes, this becomes more difficult.

Another solution is a scope with an adjustable eyepiece. But, who's going to mount a $400 Leupold scope on an airgun?

16 posted on 11/26/2012 12:13:44 PM PST by backwoods-engineer ("Remember: Evil exists because good men don't kill the gov officials committing it." -- K. Hoffmann)
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To: All

To ALL, Thanks for all your responses. I was not explicit enough. I am in PA and my sister is in MD. We had to remove the sight to ship the gun. My sister is older and we were trying to get the gun ready for her. The distance we sighted was 35 feet, which is the distance from her second floor window to where the squirrels are under her bird feeders.The only change she will need to make is moving the scope further towards the rear of the rifle.
It sounds like most of you are telling me that a.) the mere removal and b.) the backing up of the scope will totally change our sighting efforts. Is this correct?
Here is the gun & scope:
http://www.crosman.com/airguns/rifles/break-barrel/CD1K77NP

Thanks


17 posted on 11/26/2012 1:21:58 PM PST by learner
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To: learner

If she has small eyes, squinting is unnecessary.


18 posted on 11/26/2012 1:28:43 PM PST by bunkerhill7 (yup)
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To: learner
Well, I guess these days you could call that a gun. At least you didn't call it a rifle

I'm 60 years old and we called those toys. I got my first when I was 6 years old.

After I got my first real firearm 6 years later, I never confused the two.

I shoot nuisance critters around my cave with a Thompson Contender - single shot, 16" barrel, .22 LR barrel. Nobody can tell where one shot comes from.

Of course, I also have an interchangeable barrel chambered in .45-70, but that would be overkill and might attract some attention.

19 posted on 11/26/2012 2:05:43 PM PST by elkfersupper ( Member of the Original Defiant Class)
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To: learner

Spring-piston guns are not firearms and don’t behave the same as firearms. The point of aim is very dependent on the way the gun is held and consequently will change from shooter to shooter. A friend of mine owned the exact same model gun, in the same caliber, with the same scope mounted on it, only the mounts were different. After carefully sighting in each, we traded guns. Guess what, they shot to different points of impact.

The old adage about handgun shooters being able to easily learn to shoot rifles, but the reverse not necessarily being true also applies to spring-piston guns. I’ve known decent firearm shooters that couldn’t hit worth a darn with a spring-piston gun. When shooting a firearm from the bench it’s not unusual to let the fore-stock just rest in the sandbags without gripping it. If you do that with a spring-piston gun it will throw pellets all over the paper. But, with a consistent firm hold most modern spring-piston guns will stack pellets.

Pneumatics behave much like firearms, but spring-piston guns and the shooter are a package deal—change either one and the point of impact changes.


20 posted on 11/26/2012 2:13:32 PM PST by Stevee
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To: learner
Technically this is a piston gun and not a springer. Thus, the advice about springers is't 100% accurate because the piston guns don't twang sideways, just front to back. Still needs a lighter hold though.

To the OP, the only way to do it right is help her sight it for her. Insist she feeds you for making the trip. ;-)

And to the guy that says these are just toys, I'd like to point out that this gun develops 18+ fpe. Not an assault weapon but plenty for small game. You want to get hit with that toy?

21 posted on 11/26/2012 2:47:29 PM PST by ProfoundMan (Time to finish the Reagan Revolution!)
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To: elkfersupper

Elmer Keith would have used the 45-70 with 550 gr. hard cast bullets


22 posted on 11/26/2012 2:49:51 PM PST by MCF
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To: learner
However the location of the scope will be different for her than it was for me as she is shorter and the scope needs to be more to the rear for her.

That's where you lost me

23 posted on 11/26/2012 3:57:59 PM PST by paul51 (11 September 2001 - Never forget)
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To: learner
However the location of the scope will be different for her than it was for me as she is shorter and the scope needs to be more to the rear for her.

That's where you lost me

24 posted on 11/26/2012 3:58:09 PM PST by paul51 (11 September 2001 - Never forget)
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To: learner

For the folks that have unwanted visitors to their birdfeeder, but don’t want the expense of an air-rifle .22 CB caps are a great alternative. At about 2/3’s the velocity and 1/2 the energy of a .22 short they’re obviously intended for very small game up close, but they’re clearly not toys. They come in either long or short and when fired from a rifle make less noise than most air-rifles. You’ll want to shoot a few thru any rifle you intend to use to be sure that it will group with them. But, if you find a rifle that will group you can dispatch squirrel sized problems so quietly even your closest neighbors won’t have any hint.

I have an old Remington 550-1 autoloader that will normally cycle with short CB caps and if I do my part, it magically transforms bird food thieves into coyote treats with every pull of the trigger.


25 posted on 11/26/2012 6:15:34 PM PST by Stevee
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To: Stevee

I have an old Remington autoloader which will cycle shorts, longs, and long rifles, interchangeably and with total reliability.

I never tried CB caps in it tho.

Getting one to do that seems pretty remarkable to me.


26 posted on 11/26/2012 6:48:04 PM PST by yarddog (One shot one miss.)
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To: learner

To do this right you need to have two scopes. One for each person shooting. Also you need a mounting system that lets you change scopes without afecting the settings of the scopes. there are plenty of mounting systems out there that let you do this. Check with your local gunsmith and they can help you.


27 posted on 11/26/2012 7:28:40 PM PST by ColdSteelTalon (Light is fading to shadow, and casting its shroud over all we have known...)
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To: MCF; elkfersupper

And done it from 250 yards away....;)


28 posted on 11/26/2012 7:32:12 PM PST by Tainan (Cogito, ergo conservatus sum -- "The Taliban is inside the building")
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