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Message
Scope way out of alignment side to side [Update]
Posted on 2/29/16 at 3:39 pm
Posted on 2/29/16 at 3:39 pm
Went to try to sight in my 17HMR. Scope is way misaligned to the barrel so even at the extremes of the windage adjustment I'm not at POI. I moved rings front to back. Rotated them 90. played with tightening sequence. Still can't get the POI closer to the mark. I could rotate the front ring one way the the rear ring the other and get the POI to shift even farther to the left or right but that doesn't help any.
These are Leupold Rifleman rings. I had a .010 shim under the back for elevation and I have no problems there. I tried moving the shim to one side and the closest I could get is 5.5" POI to the right of the aim point at 50 yards.
I've never seen a that much off from side to side. Shimming up or down I can handle. Not sure if there is anything else I could do that doesn't require investing in specialized tools or sending it to a gunsmith. One thing I haven't messed with yet are the scope bases themselves. They were installed from the factory. Anything else I should try? Next step will probably be investing in a set of the Burris Signature rings that have the shims you can adjust.
These are Leupold Rifleman rings. I had a .010 shim under the back for elevation and I have no problems there. I tried moving the shim to one side and the closest I could get is 5.5" POI to the right of the aim point at 50 yards.
I've never seen a that much off from side to side. Shimming up or down I can handle. Not sure if there is anything else I could do that doesn't require investing in specialized tools or sending it to a gunsmith. One thing I haven't messed with yet are the scope bases themselves. They were installed from the factory. Anything else I should try? Next step will probably be investing in a set of the Burris Signature rings that have the shims you can adjust.
This post was edited on 3/2/16 at 10:27 am
6
Posted on 2/29/16 at 3:51 pm to DeoreDX
First i would try a different scope. Then try different rings.
Posted on 2/29/16 at 4:15 pm to DeoreDX
Didn't you say your scope was fricked up when you got it?
Posted on 2/29/16 at 4:17 pm to DeoreDX
quote:
One thing I haven't messed with yet are the scope bases themselves. They were installed from the factory.
Most likely the culprit IMO. I've encountered loose and badly mounted factory bases on guns before. The rings themselves shouldn't have any bearing on windage, but I could be wrong.
Posted on 2/29/16 at 5:35 pm to TheDrunkenTigah
Zero out the scope. Get a rubber maul and knock the shite out of it to realign.
First time I saw that done was by a gun smith. I freak out, but all was good after.
First time I saw that done was by a gun smith. I freak out, but all was good after.
Posted on 2/29/16 at 7:01 pm to DeoreDX
I had the same problem with a marlin 17 a few years ago. I tried everything. Different mounts,scopes ect... Turned out 2 of the 4 holes in the receiver were out of center. Should be noticeable with a straight edge. Brought the rifle back to shooters and they gave me full credit.
Posted on 2/29/16 at 9:24 pm to Crocc
quote:
I had the same problem with a marlin 17 a few years ago. I tried everything. Different mounts,scopes ect... Turned out 2 of the 4 holes in the receiver were out of center. Should be noticeable with a straight edge. Brought the rifle back to shooters and they gave me full credit.
Pulled the bases. Holes look centered. Didn't throw the calipers on them bu they pass the eyeball test. The receiver top is curved and the bases are cupped so they should be hard to miss-align unless the bases aren't machined square.
Posted on 2/29/16 at 10:44 pm to DeoreDX
How old is your scope? Modern scopes have around 6' of total windage adjustment, I believe - your scope bases would have to be way off for your scope not to compensate. Modern scopes have enough built-in adjustment capacity, to the point where non-adjustable tactical rings are the most common choice. With all that said, I would be surprised if your scope isn't an older model (circa 1980's or earlier). If it's a newer scope, then your scope may have broken internals...good luck.
Posted on 2/29/16 at 11:55 pm to RDOtiger
Had same problem with Nikon scope, sent it back after years collecting dust and they sent me a brand new model free of charge.
Posted on 3/1/16 at 11:22 pm to DeoreDX
DeoreDX,
Sorry to hear of your problems. Having a new gun that's not working right is a real bummer.
This shouldn't be a problem w/ the rings, as long as they're installed correctly. Having said that, I'd remove the rings and re-install them. Guess I'm a little too obsessive 'cause I don't the ring installation if I've not done it myself. Here's the process I suggest:
Remount the base, using BLUE Loc-Tite (NOT red). I always use the $10 Weaver bases, even on my prairie dog handguns. Before installing the scope base w/ Loc-Tite, individually check the length of each screw. Put the base in place, then screw in a screw into the intended hole. The base should be tight w/ the single screw; if not it's either too short of too long. If the screw is too long, cut off the excess w/ a Dremel tool or get a new screw. If the screw is in all the way and the base is not tight, the screw is too short. It should have a minimum of 3 threads for it to have adequate strength. If it's too short, it will need to be replaced. If a screw's not the right length, you can also try moving it to a different hole. Repeat this step w/ each screw in a different hole.
More likely, your problem is either misaligned holes for the scope base or (more likely) a problem w/ your scope. If the windage adjustment is still off after the base/rings have properly been installed and the holes look to be ok, it's prob a scope problem. You could try swapping out the scope in question w/ a scope you know to work well.
If you want to change base/rings, you can get a scope base that has a windage adjustable rear base or use Burris Signature rings w/ the proper offset plastic insterts. OTOH, both of these will be a solution to a problem that shouldn't exist.
Let us know how it goes.
Sorry to hear of your problems. Having a new gun that's not working right is a real bummer.
This shouldn't be a problem w/ the rings, as long as they're installed correctly. Having said that, I'd remove the rings and re-install them. Guess I'm a little too obsessive 'cause I don't the ring installation if I've not done it myself. Here's the process I suggest:
Remount the base, using BLUE Loc-Tite (NOT red). I always use the $10 Weaver bases, even on my prairie dog handguns. Before installing the scope base w/ Loc-Tite, individually check the length of each screw. Put the base in place, then screw in a screw into the intended hole. The base should be tight w/ the single screw; if not it's either too short of too long. If the screw is too long, cut off the excess w/ a Dremel tool or get a new screw. If the screw is in all the way and the base is not tight, the screw is too short. It should have a minimum of 3 threads for it to have adequate strength. If it's too short, it will need to be replaced. If a screw's not the right length, you can also try moving it to a different hole. Repeat this step w/ each screw in a different hole.
More likely, your problem is either misaligned holes for the scope base or (more likely) a problem w/ your scope. If the windage adjustment is still off after the base/rings have properly been installed and the holes look to be ok, it's prob a scope problem. You could try swapping out the scope in question w/ a scope you know to work well.
If you want to change base/rings, you can get a scope base that has a windage adjustable rear base or use Burris Signature rings w/ the proper offset plastic insterts. OTOH, both of these will be a solution to a problem that shouldn't exist.
Let us know how it goes.
Posted on 3/2/16 at 10:22 am to TigerOnThe Hill
Removed the scope bases, cleaned and re-seated them and locktited the screws. There were a couple of small burrs around the threaded screw part of the rings that tighten the ring to the base so I touched them up with a micro file to get that area smooth. I optically centered my scope using a mirror and checked it using a V-notched shoe box. Bore sighted across the house (15 yards) and was about 5" high and only 2" to the right. The little burr on the bottom of the rings must have been throwing the rings out of alignment to the side.
Put some masking tape around the door knob with markings for inches and used my ballistics chart app on my phone to figure out the proper POI at 15 yards (about 1" low POI).
Set up a sniper net in an upstairs window with my Caldwell deadshot shooting bags and bore sighted at 100 yards to a light on a utility pole that lasered at 103 yards away. Close enough to 100 for me. Didn't have to adjust anything the sight in at 15 yards looked good at 100. Hopefully no one in the neighborhood saw me looking through a benched rifle in my upstairs window and called the cops. Now I need to go to the range and see if it's all fixed.
Put some masking tape around the door knob with markings for inches and used my ballistics chart app on my phone to figure out the proper POI at 15 yards (about 1" low POI).
Set up a sniper net in an upstairs window with my Caldwell deadshot shooting bags and bore sighted at 100 yards to a light on a utility pole that lasered at 103 yards away. Close enough to 100 for me. Didn't have to adjust anything the sight in at 15 yards looked good at 100. Hopefully no one in the neighborhood saw me looking through a benched rifle in my upstairs window and called the cops. Now I need to go to the range and see if it's all fixed.
Posted on 3/2/16 at 10:29 am to DeoreDX
The scope was pretty far out of optical center from the factory. I always assumed they are pretty close to optical center when you get them. But mine was pretty far off. My two Bushnells and a Nikon were centered from the factory. Guess I should have checked that out before I mounted the scope since I went with a cheap BSA.
Posted on 3/2/16 at 4:16 pm to DeoreDX
Sounds like you've prolly fixed your problem.
Amen!! 17's are very wind sensitive, so be aware of that. Let us know how she shoots. 
quote:
Now I need to go to the range and see if it's all fixed.
Amen!! 17's are very wind sensitive, so be aware of that. Let us know how she shoots. 
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