hi everyone , I just mounted a Burris 3x9x40 scope on my gamo accu whisper, the scope is shooting about 3 inches to high and I have the height adjusted all the way down. do have to shim the back of the scope up and if I do what can I use for a shim . thanks .
scope shooting to high ?
- Thread starter canman
- Start date
the material you should use is tape because you have no idea what it will take, after that find something solid and change it out or buy some Burris adjustable rings and do it right
https://www.burrisoptics.com/mounting-systems/rings/xtr-signature-rings
https://www.burrisoptics.com/mounting-systems/rings/xtr-signature-rings
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The easy way to remember the answer to what you are asking is that the rear of the scope always needs to go the direction you need to move for correction. So since you can't move the rear of the scope down any more, the front must go up.
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thanks for the reply, I will shim the front of the scope up tomorrow and see how that works .
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I find the description to be a little ambiguous so let me state the two possibilities:
1. You’ve adjusted the scope all the way and the gun is still shooting low. In that case, shim the back ring (the ring nearest the ocular bell…nearest you). This is by far the most common scenario.
2. You’ve adjusted the scope all the way and the gun is still shooting high. In that case, shim the front ring (the ring nearest the objective bell).
In general, lots of different materials can be used for the shim…thick tape (electrical, duct, etc.), a business card, soda can, etc. However if it’s a springer, it’s sometimes a challenge to prevent the scope from walking due to the repeated whiplash recoil. In that case, tape will tend to work better. I normally won’t shim more than about 0.015” (3 layers of soda can or 3 layers of electrical tape). If it needs more than that, I look at other options. I find concerns over bending the scope are usually overstated but I have my limits. Those other options include, in my order of preference:
1. If it’s a PCP with a barrel band, use shims to move the barrel in the desired direction (usually upward, in which case two shims—one on the top of the air tube and another under the barrel—will usually do the trick.
2. If it’s a breakbarrel, I’ll tweak the barrel. In other words, introduce some “snoop” to counteract the droop.
3. Last resort is adjustable rings. Good ones tend to be expensive. Inexpensive ones tend to be easy to bump and lose the adjustment.
1. You’ve adjusted the scope all the way and the gun is still shooting low. In that case, shim the back ring (the ring nearest the ocular bell…nearest you). This is by far the most common scenario.
2. You’ve adjusted the scope all the way and the gun is still shooting high. In that case, shim the front ring (the ring nearest the objective bell).
In general, lots of different materials can be used for the shim…thick tape (electrical, duct, etc.), a business card, soda can, etc. However if it’s a springer, it’s sometimes a challenge to prevent the scope from walking due to the repeated whiplash recoil. In that case, tape will tend to work better. I normally won’t shim more than about 0.015” (3 layers of soda can or 3 layers of electrical tape). If it needs more than that, I look at other options. I find concerns over bending the scope are usually overstated but I have my limits. Those other options include, in my order of preference:
1. If it’s a PCP with a barrel band, use shims to move the barrel in the desired direction (usually upward, in which case two shims—one on the top of the air tube and another under the barrel—will usually do the trick.
2. If it’s a breakbarrel, I’ll tweak the barrel. In other words, introduce some “snoop” to counteract the droop.
3. Last resort is adjustable rings. Good ones tend to be expensive. Inexpensive ones tend to be easy to bump and lose the adjustment.
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How far are you shooting? I bet you are very close to the target. Tell us more about your particular set up. And, are you moving the cross hairs in the right direction? Silly question, but often times the answer is right in front of you.
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hello I am shooting at 30 yards out, the shot is right in line with the bullseye except I am about 3 inches over top of it and I have no adjustment left to bring it down . thanks .
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Try moving the dial the other way. Just to see if you went the wrong way. I have done that more times than I want to admit.
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