OK, my troubles are started

[raterminator]

Hate the situation where there is no logical explanation. At least to me.
I mounted the new 3-12-44mm scope on a new rifle and started in house (10 yards) sight –in process. All shots hit 6-7 inch lower of the point of impact. After adjusting vertical elevation up about 80 clicks (2” at 10 yards) I got the same 6-7 inch result. This time I made it 120 clicks – got again the same 6-7. Scope has 430clicks (-215 _0 _ +215). I turn the knob all the way up. The difference is just 2” up and 4 inches lower of POI. I repeated all this from 5 yard distance with the same effect…

Now, the first thing that comes to mind that something is wrong with scope, right? I have another two tested and reliable scopes (4x32 and 3-12x44) which I put to the test. And again the same result. Obviously, the problem is not in the scopes, but why am I not seeing any changes in results? Never heard about a barrel droop on Gamo rifles, but even they have some, isn’t it too much? What kind of droop is that? Maybe for 30-50 yard distance the scope could have enough vertical adjustment, but that idea doesn’t comfort me absolutely. Any thoughts?

Gun: Hunter 440, .22
Ammo. Gamo Hunter
Scopes: BSA 4x32mm, 3-12x40mm, 3-12x44mm
3-12x40mm scope has precise, center to center accuracy at 10 yards with Gamo 440, 177 rifle.

I don't know, maybe the barrel is not locking up the same every time, Gamo puts a ton of grease on the lockup pin.  I remove all that junk and just apply a thin layer of molly on it.

Did ya try putting a shim under the scope tube on the rear mount ?  A strip of masking tape works well, it dosen't take that much when you shim the rear mount to correct barrel droop if that's the problem.

barrel droop beeman adj scope mount straight shooters $57 . 1 1/2 turns counter clock wise the back of the scope will raise up. 4 Allen bolt clamp works good. you can pull scope mount stop pin if no hole is in barrel dovetail.

[raterminator]

you have the Hunter 440, .22. How is it? Does it have a droop problem?

[rabbit]

Hear we go... In my limited expereince the Gamo rifles I have owned had a degree of barrel droop and that includes a model 440. I always use a good adjustable one piece mount. I start out by zeroing the p.o.i. dead on at 20 yds. with only adjusting the mount. After this is done I move out to 30 - 35 yds. and fine tune the p.o.i. with the scope. I usually only have to move the vertical adjustment a few clicks to the desired p.o.i. and normally only move the horizontal adjustment even less to be dead on the money. Your scope reticle stays close to being centered and you always have plenty of scope adjustment to use.
     They are expensive, but, B - Square and Beeman make excellent adjustable mounts. I have always had good luck with them. I hope this helps a little. Good luck.        
                                  rabbit
     

[ribbonstone]

There is a pattern I'll follow with a problem like that.  

Have already done the first step...change scopes to one that is known to be good.

Will reverse the mount (if one piece) or switch rings front to back (if two piece).  IF the problem stayes the same, then I know it isn't the mount...if the POI gets better or worse, then it has to be the mount.

Assuming it ain't the mount, then it's the barrel's allignemnt to the reciever.  Can either adjust the mount (if adjustable) or shim the scope to match the barrel's angle...or can "tweak" the barrel to match the scope's alignment.  

In general, prefer not to "tweak" barrels of expensive rifles...have been known to do that on 'cheapies'.

[raterminator]

Thank you, guys, for all your help. Now I may assume that we agreed that the problem is in the barrel droop. Why I asked all these questions, because I have two options: spend another $57 + s/h on adjustable mount, or return the gun for exchange. That’s why I’m trying to find out if any of 440 owners experienced the same problem, or it’s just my luck.

[rabbit]

Hello all.....

     Let me recommend the Beeman model # 5039 . It is very easy to use and I have had really good luck with them.  I have one on a Gamo Hunter 890 at this time. It has a small amount of barrel droop.  From everything I have read , that is perfectly normal. Good luck......
rabbit.........

[raterminator]

It’s seems that my new 440 from CobraAirguns was pre-owned. On each of the screws I found traces of Blue Locktight. Am I right in my suspicious?

[Gene_SC]

In the library you will find a shim chart by CharlieDaTuna.. It works great because I had to do it on one of my chinese rifles. Just use negative film strips. they are about .004 thick and generaly you only need to use one or two on the end that you need to adjust.

Gene

[rabbit]

Hello,
     If I bought the rifle for a new one and paid the price for a new one , I would send it straight back to where I bought it along with a nasty letter!!!
Good luck...
     rabbit

[raterminator]

to correct the barrel droop problem which I mentioned before (Gamo 440, .22)
I used a plastic cup from paint spray can to make a shim for the rear ring. The thickness of the shim has already reached 1mm (0.040”) and it’s still shooting 2” lower of POI at 10 yards. How thicker can I make the shim before damaging the scope, unless of course 1mm has already passed that safety line?

nt.

[rabbit]

Hello...
     What is the status of your Gamo 440 rifle " barrel droop " ?  What did you decide on ?

   Rabbit    

[raterminator]

Nasty letter didn't work, Ronnie.CobraAirgun totaly ignored all my e-mails. Well,heck with them, theyjust lost another customer.I put Beeman’s adjustable mount on it and its work just fine, but I was not pleased with the big inclination of the scope. I sell the gun to my neighbor. He’s happy and I’m happy too:)Now I got another one with no problems and with the beautiful stock.