Question about Tasco Pronghorn 3-9x50mm 30/30 Riflescope - PH3950D

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HAVE A PRONGHORN TASCO MOUNTED ON SAVAGE 22 BOLT. SIGHTS IN OKAY AT 10 YARDS AND THEN IS HIGH AT 25. IS THERE AN ADJUSTMENT INTERNALLY IN SCOPE TO FIX THIS?

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No, this is not a scope issue. The scope is raised above the centerline of the barrel, thus at 10 yards, the barrell is actually slightly raised in relation to the centerline of the scope in order to hit your point of aim. Since the front of the barrel is slightly inclined, at 25 yards the bullet is still rising in relation to the scope alignment. Backing up to 50 yards you will begin to see the bullet start to drop back down, at 100 yards it may drop as much as 8-10 inches, and at 200 yards, it may drop as much as 52 inches. This is assuming that you are shooting a standard velocity .22 long rifle cartridge (1050 feet per second or so).

Posted on Sep 23, 2010

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Dec 01, 2016 | Tasco Optics

1 Answer

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...


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

Dec 30, 2010 | Tasco Optics

1 Answer

Leupold VX II 3x9x50mm scope on a rem. 270. One year old. Worked fine last year. Sighted in last week at range. Windage was dead on. Wanted to move up 1 inch in hieght at 25 yards. Tried to adjust hieght...


16 clicks is about 4" at 100 yards not 25. did you try shooting it at 100 yards? remember the scope is mounted at least an inch and probably higher than that above the barrel. at close range you will always hit low with a scope because the bullet has to climb at least an inch or more before it will be right on at 25 yards. if it is dead on at 25 it should hit way high at 100. (or the scope/ mounts are bad).

Nov 05, 2010 | Leupold ® Rifleman® 3-9x50 mm Scope

1 Answer

Why does my scope has changed it sights in every after firing


this sounds like one of two faults,,,
the scope mounts are loose or
the scope has a fault inside it ,,,ie the recoial is to much for the scope to handel

Sep 06, 2010 | Tasco Pronghorn® 4 x 32 mm Black Matte...

1 Answer

Tasco Silver Antler .22 3-9X32 while shooting rifle, scope jumped off, remounted scope, now can not adjust cross hairs, can I fix this myself?


if the scope tok a hard smck when it jumped off the rail i would say its broke the adjusters in the scope,,they can jump off there mountings if hit hard getting it fixed will cost more that the scope is worth,, if it was my scope i would just bin it and but a new scope,,and not a tasco one!

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1 Answer

I used all of the elevation adjustment on 3-9-50mm scope and my 22 rifle still shoots low at 25 yards


its a bad mount thats doing this,,,you can get over it easly by letting off the rear top mount of the scope (the mount near your eye) and pushing under your scope a strip of 35mm film this will lift the eye end of the scope giving you more range,,(elevation) only put 2 or 3 strips of film under the scope any more that this could bend the scope tube when you tighten it up
but a strip of film is about 25th of an inch and 1th will give you 1/4 of an inch at 100 yds ie:1 click! so you should easly get 10 inches at 100 yds or more with 3 strips of 35mm film under the scope even with bullet drop, the only other way to sort this out is to buy an adjusterbal mount witch is very pricy and 35mm film is cheaper, i do this all the time with my scopes

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2 Answers

Tasco 6x24x42 cosistancey issues afield.


It has to settle in to the mounts an the mounts to the gun. You take a screw driver and tap on the scope as you adjust it. Tap with the handle and just tap it not bang. every time you make an adjustment tap it. The 222 does not give a great kick so you do not get the settling from that, you have to cause it by taping the scope with the screw driver.

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1 Answer

Windage and elevation adjustment all over the place


Sounds like you want to "re-sight" in your rifle. Make sure mounts are okay and tight. Look down barrel and then thru scope and eyeball windage and elevation adjustments so the scope seems to be fairly in line.

Clean barrel if it needs it.

For basic sight in, start at 25 yards with a large(3 to 4 feet) cardboard or wood backdrop around target (bullseye). Fire at target. Once done, look through scope and position rifle such that the shot mark you created is dead zero. Hold rifle very steady and you or buddy move windage and elevation adjustments until scope moves dead zero back toward original target (bullseye). Fine tune from there. Air cool rifle between rounds. Once dead eye, fire another round or two to check grouping. Check your ballistics (sometimes on ammo box) to see how height at 25 yards affects your desired dead on target (100 yards, 150 yards, 250 yards etc.). Adjust accordingly. Example: you may need to sight in at an inch high at 25 yards, depending on your dead on target distance..

Always remove sling from barrel when sighting in.

Try to sight in at similar temperature as you intended shooting temperatures, if possible.

If not black powder, avoid cleaning barrel between sight in and hunt/competition unless you note bad buildup inside.

If you change ammo, understand that that may affect performance. Once a preferred ammo is found, some even try to buy a decent quantity with the same lot number on the boxes if storage allows for such.

May 02, 2009 | Optics

1 Answer

Zeroing scope adjustment


First, adjust wind-age and elevation to center or zero position. Remove your scope from the gun and make sure that the scope mounts are aligned, this is critical. Purchase an alignment tool is necessary. Then remount the scope. The scope should seat in the mounts without binding. If it does bind, the mounts are not aligned.
Start sighting in at close range,10 to 30 yards, then move out to 100 yards.

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