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Whats going on with my .22

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/28/2008 at 07:58
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Optics Apprentice
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Hey guys
 
Ok ihave a Marlin .22lr with a Nikko Stirling Platinum Nighteater 4-16x44.
 
The barrel has been cut to 18" and i am using subsonic as well as match rounds.
 
The scope is mounted courtesy of BSquare mounts.
 
My problem:
 
I run out of elevation.
 
The scope has 51 MOA of elevation (confirmed by counting the actual clicks).
 
At 85 metres, i am around 2" short and am maxed out on adjustment.  I cant even get close to 100 metres.
 
What is going wrong?
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/28/2008 at 08:52
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Start looking at the mount set up.  With most set ups you should be able to zero at 25 or 50 yards and only be down 4" at 100 yards.  It sounds like the rear base is higher than it should be.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/28/2008 at 17:24
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X = 180 Y = 90 (X+Pyro)+(Y-Pyro) = ?

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+1 this is where I'd start.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/28/2008 at 17:51
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Originally posted by silver silver wrote:

Start looking at the mount set up.  With most set ups you should be able to zero at 25 or 50 yards and only be down 4" at 100 yards.  It sounds like the rear base is higher than it should be.


I think you are backwards aren't you?  The rear base needs to be higher to give him more elevation to reach 100 yards.  You may need to shim your rear base. 

I put a 20 MOA base on my .22 so I could reach 300+ yards so reaching 100 with a standard setup theoretically should not be a problem. 
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/28/2008 at 18:00
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That is what i was thinking supatool.
 
I thought the rear should be higher (not that it is of course).
 
I am amazed though that i cant reach it with the standard setup.  is that common?
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/28/2008 at 18:05
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No, that is not common.  Something is wrong somewhere.  If you have another scope you can try put it on the gun and see if you get the same results.  If not the maybe the reticle in the scope is out of whack. 

If it repeats then I would looks at rings and mount next.  If you can get your hands on another base try that and see what you get. 
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/28/2008 at 20:42
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Thanks i will look into it.  I wouldnt be suprised if it is the scope to be honest with you.  The rifle groups all over the shop.  With Match ammo at 50 metres it is doing around 2".
 
With standard subsonic remington ammo it is doing 4"!
 
The reason why i say it may be the scope is because although it is clearly a 4-14x44, it is marked as a 6.5-20 so if they can let something like that slip QA then who knows what else would slip.
 
 
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: October/08/2008 at 19:53
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It is not at all uncommon for folks using relatively high power scopes to run out of elevation when shooting a .22 at 100 yards. This is especially the case when using subsonic target ammo; there is just so much "drop" in a .22 at 100y that most high power scopes - with their limited FOV - can't get the POI "up" to the optical center.
 
First, I'd check the obvious - mounts and/or rings secure and both the same height?
Next, I'd look up the range of adjustment of your particular scope.  Do you have enough adjustment to compensate for the enormous drop of the .22lr?
 
One "solution" ,if your base and mounts check out, is to install a set of Burris "Signature" rings, and buy an "offset insert" kit. These rings have a polymer insert that is spherical on the outside that rides in rings that are spherical on the inside.  You can buy the offset inserts to tip your scope as you want to the allow for long distance shooting. Put a "-20" insert in the top half of the rear ring and a "+20" in the bottom half, with standard"0"  in    both halves of the front ring. Then, try to adjust your scope.  I predict joy. If not, remove the "0" inserts and add a "+10" to the TOP half of the front ring and a "-10" to the BOTTOM of the front ring.  Bet you'll be there!
 
The neat thing about the Signature system is that you can achieve this "tipping" of the scope, without stressing the scope tube at all - undertand that the insert system is kinda like a "ball joint" for your scope tube.  A "plus" is that you will never again mar up a scope, and you don't have to lap them.
 
Please, don;t even think about shimming your scope. BAD IDEA unless you want to buy a new one.
 
Good luck!
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: October/08/2008 at 20:00
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Thanks for the info.
 
I bought a set of 30mm rings and fitted the chinese prototype (same coy that makes Millet) to it.  I have not yet tested it but i will either today or tomorrow and let you know how i go.
 
I was talking to a buddy and he thinks its the scope.  He says this because he remembered (when i clearly forgot ) that we were shooting clothes pegs off a metal frame at 50+ metres.  The both of us would get 10/10 everytime.  That was a while ago.  Now, i cant even hit a bunny at 20 metres.  I kid you not.  I went out with some friends for some spotlighting and i was missing bunnies at 20 metres.  my POI was ever changing and i could not guess the right spot to plant the crosshairs.
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