Cannot zero rifle - not enough adjustment

[agdodge4x4]

 The issue is that I can't get the "dang" thing on paper at 40 feet.  I am using the open sights, and when adjusted to the extreme far end of its range, it still hits about 6" high and 4" to the right.  No more adjustment.  I'm not worried about elevation, I can fix that by moving back.  I cannot, however, fix windage.  I tried with two different kinds of pellets.

One is some kind of crosman with a ballistic tip plastic insert, the other is some old pellets I had from 20 years ago as a kid.  Those were used in my Crosman pump up pellet gun and I could nail a blackbird in the neck at 25 yard without a whole lot of issue.

Any tips on what to do now?  I can't adjust the front sight, and the read won't click any more over!  Its a beeman sportsman 1000 series gun.

[bandg]

Never heard of such an extreme misalignment for open sights, especially at 40 ft.  Is the rear sight mounted in a dovetail?  Can the rear sight be drifted to the side in it's mount?  Seems very unusual for sure.

[gamo2hammerli]

Check the barrel...could be bend.  My friend had a slightly bend barrel....I just stuck it under a railway track (With our t-shirts wrapped around the barrel) and lifted up a bit a few time and the rifle shot straight...and was pretty accurate.  But before you try that, test with more different pellets...

[mpbby]

Besides checking if the barrel is straight, if you send pictures of the rear sight, it will probably be easier for suggestions.


If it's the case to bend the barrel (vertical - and - horizontal), I would do it with a proper device.  Nced (GTA member) did some posts with pictures from his device (I use the same idea).

[Roadworthy]

As mentioned, check the barrel to see if it's straight.  If it's a break barrel it's easy enough to open the action and sight down the bore.  It should provide a straight, clear path to the muzzle.  If your barrel is straight check that the sights are in line with each other.  You could run a string along the barrel for this check, perhaps put one end in the breech at top center and close the action to hold it.  You didn't say whether the error was horizontal or vertical and I've been concentrating on the horizontal.  I had a Diana 48 with vertical issues.  I had to lower the front sight quite a bit to get it on target.  Problem solved.

[onet12]

as mentioned previously check the barrel than you can try to do this:

The windage - you can twist front sight to the right around 2 mm.
It sits on the barrel so you might need to heat it up plastic with hair dryer or stick it into boiling water.

For the windage - you need to extend front post.
Find a black piece of plastic, shape it and use a super glue to extend the front sight.

[agdodge4x4]

I did twist the front sight a little.  It seemed to make VERY little difference.  I'll try again.  I had this gun completely disassembled to replace the piston seal.  I am wondering if the  barrel pivot pin/screw is not perfect true and perhaps the breech is not square to the receiver.  If that is the case, I should be able to loosen that screw by a tiny amount and change the impact point.

I don't see an OBVIOUS bend in the barrel, but I did get this gun used and the front fiber optic is broken off, so that will account for the elevation issue, and perhaps there was additional damage when that happened that I do not see.

The rear sight looks exactly like the one in my attachment.

Maybe I need to start over.  What should I site this in at?  I'll 'zero' the sites and everything and just start over.

[Roadworthy]

You have not mentioned whether you are off horizontally, vertically, or both.  Nor have you mentioned brand or model of gun.  Did the gun EVER shoot correctly?  You do admit disassembling the gun.  If you have removed the barrel it is possible pivot washers are not correctly seated.  If there is too much pressure in the fork/barrel area that WILL pull the shots off to one side.  Of course if the front sight is broken off that WILL make a huge difference in elevation.  A bit more specific information about your problem would go a long way toward a solution.  Without information we're just making guesses.  (Of course one COULD happen to be correct.)

[bandg]

He did state Beeman 1000 series and off both vertically 6" and horizontally 4" after full adjustment of sight.  Obviously something afoul here but knowing what without seeing the gun is unlikely.  6" high is extreme unless the front sight is broken off.  I would post more pictures for additional help, including some of both sights on the gun.

[Roadworthy]

My bad.  I got so lost in the suggestions I lost sight of the original problem.  The main concern appears to be the horizontal deviation.  For that I still think it may be something having to do with the pivot.  The pivot washers could be too thick or they may not have seated properly back into their recesses when the barrel was reinstalled.  I'd start there.

[bandg]

It was easy to miss.  Pivot washers are as good a thought as any, especially since he notes he had it apart.  More pictures would probably be helpful. 

[nced]

The issue is that I can't get the "dang" thing on paper at 40 feet.  I am using the open sights, and when adjusted to the extreme far end of its range, it still hits about 6" high and 4" to the right.  No more adjustment.  I'm not worried about elevation, I can fix that by moving back.  I cannot, however, fix windage.  I tried with two different kinds of pellets.

One is some kind of crosman with a ballistic tip plastic insert, the other is some old pellets I had from 20 years ago as a kid.  Those were used in my Crosman pump up pellet gun and I could nail a blackbird in the neck at 25 yard without a whole lot of issue.

Any tips on what to do now?  I can't adjust the front sight, and the read won't click any more over!  Its a beeman sportsman 1000 series gun.

"I cannot, however, fix windage"
Sure you can if the barrel isn't a shrouded barrel..............simply bend it as required and I do this all the time. After optically zeroing the scope I bend the barrel so the poi is withing about 1" of the point of aim at my zero distance (30 yards), then the fine adjustments are done with the scope turrets. That way the erector set is real close to "centered in the tube" which provides even spring tension to maintain the reticle setting with the recoil of my .177 HW95 springer..........



Using the "barrel tweaker" for adjusting my new .177 HW95 barrel to match the poi of a "optically centered" scope (via the "mirror method")............


As a side note....a while back I tried to use a RWS Lock Down one piece mount that was designed for the RWS guns that normally have a LOT of droop from the factory. This didn't work at all with my .177 HW95 barrel without much droop and the poi was about 3" high at only 18 yards. Just for grinns I bent the HW95 barrel so the poi was about 1/8" low and learned that adding enough bend to move the poi a few inches at only 18 yards couldn't even be seen with the naked eye! Anywhoo.....I simply chucked the useless RWS Lock Down mount, remounted the scope in my "normal mount at that time", and re-bent the barrel for proper poi with the optically centered scope.

LOL....I even have a "tweaking tree" off the side of my back yard practice lane but it is only good for adding snoop and windage to my HW95 break barrel. Actually, my preferred method of "barrel tweaking" for ALL bending is the home made "barrel tweaker". The "barrel tweaker" puts bending stress on the barrel only, not where the barrel is pressed into the barrel pivot block, on the stock mounting screws, or  the stock itself. While I haven't had any issues with the "tweaking tree" it was used very carefully (don't need a broken stock or stock mounting hardware)......

[agdodge4x4]

THANK YOU SO MUCH FOR THE ADVICE!

I don’t recall the gun being zeroed when I first shot it and shortly after that the seal gave out.

Based on the suggestions here and a suspicion that a sight damage may point to mistreatement, I put my straight edge on the breech block. The barrel is tweaked to the right.  I will need to remove the stock and set that block on something a setup a tweaker like in the post. So, even with my rear sight adjusted to the far left, it’s not enough to account for that bend and the further the target gets, the more it’s off. Doesn’t seem bent much though.

I honesty thought I was just a bad shot. This thing much have a 10 lb trigger!  It’s terrible compared to my Gamo Expo 26

Dang....