GTA
Airguns by Make and Model => Benjamin Airguns => Topic started by: clip on August 07, 2011, 03:57:09 PM
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I've been shooting my Titan MP, trying to get the scope zeroed. At 10 meters, it will print a 5 round, one hole group all day. Trouble is, it prints 2 to 3 inches low. My scope is the CenterPoint that came with it but it's at the maximum elevation. I can't raise the POI any farther. It looks like I'm going to have to shim the back ring to get it where I need it. Has anyone had this problem? I dislike having to shim but I've never heard of a Titan with barrel droop...even tho I suppose any break barrel could have that. It's a refurb 22 caliber ,well past the return time. It's a smooth, accurate shooter and I surely would like to solve this. I suppose the scope could be the culprit but I just can't see that. Anyone have an idea other than a different mount or shimming? I sure could use your thoughts.
Thanks, guys
Larry
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Okay, this might be an easy fix, when you say max setting do you mean you can't spin the dial any futher or do you mean it's on the highest number. When I got my Np Trail, the scope was as you say now, I had to spin the dial 2 full times so it was back on target. I'm sure you probally already know this but if not this might be the fix.
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Sorry..I guess should have said the dial will not move any higher. It's at the stop....it cannot be moved---it won't turn--- any higher to raise the elevation. In the past, I've had to place a shim inside the rear scope ring in order to bring the POI up. I've heard this isn't good for the scope so I was hoping there might be another solution.
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Hi
Check the breach seal. It should not be too high above the breach area. If it seems too high, you can put a feeler gage into the breach. I think there should be metal to metal contact without leaking air.
It the breach seems to be correct you can shim the scope. Before shimming scope center the scope controls. You can do this by traveling the knob from top to bottom and back 1/2 way.
The scope maker should be able to tell you the number of turns needed.
Some mount makers have mounts with 1 or 2 degree elevation built in.
last option is to bend the barrel up some.
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You can also try reversing the scope rings front to back.
pv
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I had a similar problem so I replaced the stock rings with a UTG solid mount and the problem went away. After 400-500 shots the scope broke so I put a $19 fixed 4X Leaper's 5th gen on it. No issues after 8,000-9,000 shots.
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Also, if you are shooting a one piece mount, you can turn that around too, had to do that to mine.... Mike
I had a similar problem so I replaced the stock rings with a UTG solid mount and the problem went away. After 400-500 shots the scope broke so I put a $19 fixed 4X Leaper's 5th gen on it. No issues after 8,000-9,000 shots.
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I read on the Pyramydair blog that the best way to start is to optically center the scope.
1. Cut two Vs in the top of a box.
2. Unmount the scope and place the scope tube in the Vs.
3. Put the crosshairs on some type of stationary target.
4. Slowly rotate the scope in the Vs and watch where the crosshairs move off the target.
5. By trial and error, adjust your scope turrets until you get your minimum amount of movement of the crosshairs. This can take a while. Never assume that your scope is optically centered from the manufacturer.
6. Remount your scope in your rings, level the rifle and scope, and try zeroing the scope again.
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Easiest way to optically center a scope is set the objective vertical on a mirror (might need a piece of glass as a spacer) with enough side light to see both the mirror image and actual reticles. Adjust turrets until they align. Done.
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Hmmmm, I'll have to give that a try. It would indeed be much easier than the hit and miss of turning the scope in a box. What do you see in the mirror, the crosshairs offset?
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UPDATE! I seem to have the zeroing problem fixed. I tried to optically center the scope using a mirror but I couldn't get it to work. I couldn't see the reticule at all. I hadn't heard of using a piece of glass as a spacer to allow light in so all I could see was blackness...wasn't smart enough to figure that out, I guess. I ended up using a piece of thin plastic under the rear ring. Now the elevation has all the adjusting movement that I need. It's now adjusting dead-on at 10 meters using several different kinds of pellets. I have to add that the best group so far was from the H&N 10.66 grain Field Target Trophys. I'm getting five round, one hole groups that are less than a dime (0.160 inch ) in size measuring from the outside edges.
Thanks to all of you for the tips you shared. DEMARISL..thanks for the reminder to use some glass as a spacer when trying the mirror trick.
Larry
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H&N 10.66 grain Field are great pellets and you pick up a little velocity also. My titan loves them also but I shoot mainly CPHP Pellets.... thats one nice small group you shot, what distance was it ?
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How is that possible, when the titan GP is in .22 caliber? :p
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How is that possible, when the titan GP is in .22 caliber? :p
the titan also comes in 177 cal but walmart does not sell them i got mine from pyramid air and it shoots great.
clip your original problem seems simple to figure out and although you figured it out this may have been the problem. keep in mind that the scope is mounted above the barral a couple inches from center of the barral to center of the crosshairs, and when you fire a rifle any rifle the pellet makes an arch. so when it leaves the barrel it slowly rises and then as it looses power it will start to drop. with your titan you are just shooting from a position that is close enough to your target that the scope is not able to compansate for that close a distance.i had this problem with the original scope on my titan and switched it out for the centerpoint 4x16x40 from walmart it had the 5 yard parallex adjustment so i was able to sight in at 10 yards. .......... basiclly the pellet just needs to come up enough or the scope needs to be adjustable for that close distance shooting some of us do. i shoot in the basment in the winter and like you i had to figure it out........dave
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Easiest way to optically center a scope is set the objective vertical on a mirror (might need a piece of glass as a spacer) with enough side light to see both the mirror image and actual reticles. Adjust turrets until they align. Done.
I tried this on the CenterPoint 4X32 that came with my Benji Titan NP. I didn't have any spare glass around either, so I put a couple of paint stirrers spaced apart under the bell, adjusted the turrets, and it worked so good, I unmounted my CP 4-16X40AO and did that one also. Excellent tip. Works wonders.
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Using a mirror to optically center a scope is not my idea but simply knowledge picked up and passed on. Glad it helped.
Larry