Question about Tasco Optics

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Scope will not bore site. when cranking scope left it goes right, when cranking scope down it goes up. when goes other directions it runs out of adjustment before reaching barrel sight line by 2" in eather direction at 25'. we have correct mounts, all is solid.

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The sighting sounds about right to me meaning to you need to adjust the cross hairs i the opposite direction to where your point of aim is. If your sight is off 1/4 inch to the left you need to bring the barrel to the right to compensate and that's what the bore scope/site is doing. Think opposite and you'll have that tuned in a few seconds. I don't doubt that you have the correct mounting hardware BUT, it's from center bore to center scope what 2 inches so at 25'? Depending on what caliber I'd say at 25' you need to hold 2 inches high for center target. I'll just guess that you might not be able to get a zero until say about 25 yards with a 22 short. A larger bore/caliber will extend this out to possibly 100 yards.
I'm going to give you a link to a bullet trajectory chart so you can sort of see what it is I'm trying to write. you may need to cut and past this in your browser window.

http://www.chuckhawks.com/rifle_trajectory_table.htm

Here is another chart that shows a bullet drop from the muzzle.

http://www.chuckhawks.com/bullet_trajectory.htm

Hope this was a help have fun and be safe

Posted on Dec 30, 2010

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Posted on Jan 02, 2017

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How do i use a tasco 28A


1. Insert the Bore Stud into the Stanchion while aligning the arrows as shows. Insert the assembled scope guide into the muzzle of your rifle with the grid pattern upright. 2. Select the Aperture Cap that fits your objective rim. Place it over the objective end of your rifle scope and press until it fits flatly against the rim. 3. Using the Adjustable Scale measure the top of your rifle scope tube to the center of the rifle bore as follows: Open the rifle breach. Rest the upper arm of the scale on the scope tube before or behind the windage and elevation turrets. The scale markings should be facing towards you reading vertically and ascending from bottom to top. Slide the lower end of the scale up or down until it is touching the center point of the bore. On center fire rifles the center point will be the firing pin. On rimfire models the center will be the shell extractor. Read the number that corresponds to the indicator marked "CF". Make a note of the reading. 4. Aim the rifle toward a light, flatly lit area such as a wall or open sky. Caution: Do Not Look At The Sun As Permanent Eye Injury Could Result. 5. While keeping the riflescope at the right distance to see the full field of view, sight through it on the grid pattern. Move the stanchion right or left until the bold centerline is parallel to the vertical reticule wire. Turn the windage dial right or left until the vertical reticule is aligned with the grid centerline. 6. Use the reading from the scale to align the horizontal reticule wire. Find the numbered horizontal grid line that corresponds to the number on the scale. Turn the elevation dial right or left until the horizontal reticule wire aligns with this corresponding grid line. 7. To make your final zeroing adjustments remove the scope guide from the bore of your rifle. WARNING: FIREING YOUR RIFLE WITHOUT REMOVING THE SCOPE GUIDE MAY CAUSE DAMAGE TO YOUR RIFLE AND OR CAUSE YOU INJURY At a range or other safe area test fire a group of three rounds of the same type ammunition at a target at least 50 yards away. Refine your scope alignment by adjusting the windage and elevation dials. Move to your desired distance from the target and test fire another group and make your final windage and elevation adjustments. 8. Restore the stud tension by pressing the end of the spring.

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i would start by supporting it on a table, if you don't have a bore sight look down the barrell or side of the barrell, holding it steady look into the scope. make them match the a spot on the wall, keep adjusting the scope until they match. this will get you close before you shoot. i would set up a target at 25 yards. set the scope close on left, right, up and down. move out to 100 yrds and shoot a 3 group pattern. let the barrell cool, make adjustments and shoot again. it should be set.

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How do i calibrate the scope to hit where im aming the crosshairs?


Bolt action? If not, ignore this, but , if it is a bolt gun, remove the bolt. Mount the rifle in a vice type clamp or a cardboard box with v's cut in it to hold the rifle steady, aim through the bore at a target 100 yards away. make the rifle stay on the target, now peek through the scope, it should be on the same target, if it isn't, move the adj up or down, left or right to get it on target, then check the bore again, then the scope again. This will put you on paper at 100 yards, fine tune it from there. Hope this helps.

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I have given this tip to a dozen people this week. It will save you a ton of ammo. If you don't have a bore sighter of access to one, get a big cardboard box, cut V's in the top that the rifle will sit in nicely, remove the bolt. Find a target, 100 yards away, sight down the bore, tilt box, rifle to target, make sure it doesn't move, adjust scope to the same target. check to see if the rifle is still on, then check the scope again. This will put you on paper at 100 yards.

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you will need to tweek the scope a bit as you havent taken the bullet drop into the ajustment that way,,

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It's a common misconception that you are moving the bullet's impact on the target... the bullet is hitting where the rifle is pointing and you want to get the scope to look at that very same spot.
To move the scope's reticle up or down, turn the elevation adjustment on the TOP of the scope in the direction you want the scope to look, so if your shooting low, turn the scope's adjustment in the DOWN direction.
If you want to move the direction the scope is looking left or right, turn the windage adjustment on the RIGHT side of the scope left or right to look where the bullet is impacting. To move the crosshairs to the right, turn it right.
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CAN NOT ZERO GUN


You may try to bore sight it first. Pull the bolt and setting the gun on a good rest sight thru the barrel at a dot on the wall within ten feet. Then adjust the scope to that dot. As you adjust the scope tap the bore of the scope with a screw driver handle, tap it after each adjustment not hard, but enough to give it a sharp jolt. Once you are close here, move out to the range and shoot at 15 yards. Using a rest, again tap the scope after each adjustment. Then move out to 50 yards and you will want to be shooting high 1.5 to 2 inches here. Shoot slow keep the barrel cool and try for 2 shot groups till you have got the scope dialed in. Then move out to 100 yards for your preference of zero. Remember use the same ammo you will hunt with or at least the same bullet weight. If you can't get her to get on paper you can try to loosen the scope in the rings, one at the time once the gun is a little warm. Loosen the barrel ring first then snug it back down and then the receiver ring. If your group moved now, she was in a bind due to a cold gun at set up / installation.

Dec 01, 2009 | Optics

1 Answer

I need a scope guide instruction sheet for the Tasco 28a


1. Insert the Bore Stud into the Stanchion while aligning the arrows as shows. Insert the assembled scope guide into the muzzle of your rifle with the grid pattern upright.

2. Select the Aperture Cap that fits your objective rim. Place it over the objective end of your rifle scope and press until it fits flatly against the rim.

3. Using the Adjustable Scale measure the top of your rifle scope tube to the center of the rifle bore as follows: Open the rifle breach. Rest the upper arm of the scale on the scope tube before or behind the windage and elevation turrets. The scale markings should be facing towards you reading vertically and ascending from bottom to top. Slide the lower end of the scale up or down until it is touching the center point of the bore. On center fire rifles the center point will be the firing pin. On rimfire models the center will be the shell extractor. Read the number that corresponds to the indicator marked "CF". Make a note of the reading.

4. Aim the rifle toward a light, flatly lit area such as a wall or open sky. Caution: Do Not Look At The Sun As Permanent Eye Injury Could Result.

5. While keeping the riflescope at the right distance to see the full field of view, sight through it on the grid pattern. Move the stanchion right or left until the bold centerline is parallel to the vertical reticule wire. Turn the windage dial right or left until the vertical reticule is aligned with the grid centerline.

6. Use the reading from the scale to align the horizontal reticule wire. Find the numbered horizontal grid line that corresponds to the number on the scale. Turn the elevation dial right or left until the horizontal reticule wire aligns with this corresponding grid line.

7. To make your final zeroing adjustments remove the scope guide from the bore of your rifle.

WARNING: FIREING YOUR RIFLE WITHOUT REMOVING THE SCOPE GUIDE MAY CAUSE DAMAGE TO YOUR RIFLE AND OR CAUSE YOU INJURY

At a range or other safe area test fire a group of three rounds of the same type ammunition at a target at least 50 yards away. Refine your scope alignment by adjusting the windage and elevation dials. Move to your desired distance from the target and test fire another group and make your final windage and elevation adjustments.

8. Restore the stud tension by pressing the end of the spring.

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