Zeroing a new scope ....

Hi All.

Just mounted my new Tasco 6-24 on my Ruger 1022.

I'm having difficulties zeroing it for 50 yards.

I placed a target out at 25 yards, and zeroed it on that. Nice tight overlapping 3 round groups, however, it needed a good few winds on the elevation adjustment to bring it to zero.

Moved the target out to 50 yards, and I can't zero it at 50 .. Its wound out to maximum "up" (see attached picture) but I still have to shoot 5 or so inches high to hit the bull.

I'm guessing at this point that I need to adjust the scope mounts in some way in order to rectify this and get it zeroed for 50 yards ?

Any advice would be greatfully received ...

Regards

Tim
Attachment 5027

Tim, you should have a grub screw on the turret, loosen that - normally with allen key. Looks like it is above the white 9.

That should allow you to turn the turret down without it engaging. Tighten again, re-do shoot, if required you can dail up by the same amount again and go thru the same process.

Shout is that does not make sense...

Are you using subs or "real" 22 ? Bit odd that you have to dial up that much for 25m...

Oh, and at what magnification are you zeroing at ?

Subs. They've proven to be nice and accurate, and I've got a brick of them.

With my other tasco scope these rounds have been shooting inch groups at 70. Half inch at 50., and overlapping at 25. So I'm pretty sure its not the ammo.

I undid the grub screws and took the whole turret off. I can't see how it would screw down like you said - that was my original thought too

I changed magnification after zeroing at 25. Is that a factor ?

Tim

Tim, don't want to be the one to say it but......
sounds like the scope to me

Quote:

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Originally Posted by kiwi39

Subs. They've proven to be nice and accurate, and I've got a brick of them.

With my other tasco scope these rounds have been shooting inch groups at 70. Half inch at 50., and overlapping at 25. So I'm pretty sure its not the ammo.

I undid the grub screws and took the whole turret off. I can't see how it would screw down like you said - that was my original thought too

I changed magnification after zeroing at 25. Is that a factor ?

Tim

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Loosening the grubscrew just allows you to zero the turret barrel to a desired mark on the scale, it doesn't give you more elevation. As you have found.
Scope sounds sus. 5" drop between 25 and 50yds even for a 22 sounds excessive.
If you suspect the change in magnification may have something to do with it set rifle up in a steady rest aimed at something and rotate the magnification and see if crosshairs move. You can also do the same check thru the range of elevation adjustment and see how the crosshairs respond.
Are you using cheap rings? I have had el cheapo rings that were not matched and by swapping front to back I got a totally different point of impact.

think i suggested b4 you bought it i used one of them tascos as target practice ....:oh noes:

you did indeed, and more than once today, your words were ringing in my ears, however, read my next post ... ;)

ok, I'm sort of sorted.

The scope is shooting accurately enough.

Part of the problem was me shooting in the wind. I didnt even stop to think, because the deck I shoot from is nice and sheltered, and the targets are out in the paddock in the full force of the string somewhat gusty breeze.

I think the wind was also a factor in the excessive drop between 25-50 yards - the path between my firing possie and the 25 yard target is also relatively sheltered by comparison.

What a dick :wtfsmilie:

Its calm now, and I just shot the same accuracy as I did previously with my other Tasco (3-9x30) (overlapping holes @ 25, half inch group at 50 yards)

However, the issues with the turret wound up to the max still remain.

might see what the local gunsmith has to say about it ...

I think Zimmer's advice re the rings may be the next port of call in solving this.

cheers for the help guys

Drop for a sub from 25 to 50 is around 76mm

Cut a bit of coke can to size and put it between the front ring and your base. That will lift the scope.

Quote:

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Originally Posted by zimmer

Loosening the grubscrew just allows you to zero the turret barrel to a desired mark on the scale, it doesn't give you more elevation.

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reset the turret barrel to zero when the scope is sighted in for 25. loosen grub, press down or turn counter-clockwise - check the manual, tighten grub again

if you can continue to dial up more elevation, happiness

if you have reached the end, that is a different problem, probably better to see the gunsmith than messing with shims etc.

option 3: shoot the tasco and buy a leupold :P

Quote:

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Originally Posted by Tahr

Cut a bit of coke can to size and put it between the front ring and your base. That will lift the scope.

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or go to supercheap auto and get a cheap and nasty set of feeler gauges, you have shims for life :thumbsup: sorted out a couple of jointer / buzzers with those...

Quote:

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Originally Posted by Tahr

Cut a bit of coke can to size and put it between the front ring and your base. That will lift the scope.

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Would have to be the back one to give you more elevation, front mount will make it shoot even lower

I was going to say that Sudattack :)

OK, so I shimmed up the rear mount with 1 layer of aluminium LOL can (LOL is a kids fizzy drink). only a little change.

So in the spirit of P for plenty I gave it shit and put 2 more layers in, making 3 layers in total .

BINGO !!! It now zeros at 50 yards, with the vertical turret wound up to about half way from it's bottom setting.

Thanks for your advice guys.

Tim

Glad it worked. Even if my advice was a bit back to front. Thanks for the correction Sudattack.

Quote:

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Originally Posted by Tahr

Glad it worked. Even if my advice was a bit back to front. Thanks for the correction Sudattack.

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Yeah, me too. I'd already figured out you had it arseabout, was just figuring how to say it diplomatically when Sudattack saved me the job.

But anyway it's saved me from having to sell the scope, which is a nice one.


Tim

Quote:

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Originally Posted by ebf

option 3: shoot the tasco and buy a leupold :P

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Wow big statement
Is leupold not made in the same factory as simmons ???:shave:
Night force and nikon are ???
Id be surprised if you could see a tasco scope thru the haze of a leupold scope hehe

welcome to the forum 6mmbr, where in Tanzania you based ?

Thanks ebf,
I am in a place called Tarime/North Mara.
But fly home to shoot as i dont really like the idea of bagging African game.

nice part of the world :) not too far from Serengeti and Masai Mara. post some pics when you have time.

you do much fishing on Victoria ?

Not on Victoria,
Have done a bit down south in Mtwara. Have not been to sucsessful with it tho.

Quote:

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Originally Posted by kiwi39

OK, so I shimmed up the rear mount with 1 layer of aluminium LOL can (LOL is a kids fizzy drink). only a little change.

So in the spirit of P for plenty I gave it shit and put 2 more layers in, making 3 layers in total .

BINGO !!! It now zeros at 50 yards, with the vertical turret wound up to about half way from it's bottom setting.

Thanks for your advice guys.

Tim

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Nice work on the zero.

Did the rings or bases get changed / installed with the scope as well or just the scope replaced?
Only asking as it almost sounds as if a MOA base etc was reversed ?? esp if needing to shim the scope up...
Just curiosity asking here!

I zero/sight in at 15m. Perfect out to normal .22LR hunting ranges. Get it on paper, then use the bullet hole as point of aim. Have done this for over 30 years. Try it. You'll like it.

first rule, ditch the dovetail mount use a weaver type base/rings.
then get a trigger job done !