GTA
Airguns by Make and Model => Gamo Airguns => Topic started by: vandler on December 26, 2011, 09:53:11 PM
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I went to sight in my rifle and it was hitting 1 inch high and 1 inch to the right. I zero it in at 30 yrds and took off gopher hunting. missed 6 times. after the hunt i went to zero in again and i was and inch low and an inch to the left. i don't get whats happening. When i zeroed before the hunt i ran about 30 pellets thru it and it was good. is this a lose in fps? should i inspect my seal? will temperature make this much difference from mid day to afternoon temps. new gamo with maccari tune and grt4 trigger leapers 3-9 ao scope.
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Thats a big variation on POI. I`d say you have either ,1) bumped the sight or
2) got a loose sight
I wont say the sight is kaput yet , but it may also be the reticule floating around. Air guns are savage on Tele-sights. Is it specifically for use on an air rifle ?
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yep. designed for air rifles. I also would like to add that my gun started dieseling also, it got really laud/ there was a CRACK everytime i shot it.
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MMMm, Bit weird , dieselling may cause a little flatter trajectory , if the velocity increases slightly , but then this is not always the case. The unknown problem is though , precisely what the effect is on every shot . What have you got in there to fuel it ??
Can I suggest that you shoot the heck out of it until it stops combusting , then try for a group again at the same distance as before. Nothing consistant is going to be gained until it stops.
good luck.
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ill tighten my scope mount and run a bunch of lead thru it. see if it calms down. could a temp drop from 60- 48 cause this issue? I did a maccari tune on it 2000 rounds ago. the only lube was molly and a little clear stuff. it was great till now.
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One other thing that "may ' be happening ,,,, are you allowing the fore-end to come against something solid, eg are you shooting through a doorway using the doorframe as a steady against the forend. This will make your shots go all over the place. Ensure that each time you let a shot go , that nothing other than your hands are supporting the rifle . Dont grip the fore-end too tightly , that will also make shots go left and low. .... Is it still dieselling ??
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I have the artillery hold down and everything was great until suddenly POI wandering. I'm tearing my rifle down now.
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So what happened seals go south? rebuild? just curious
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The change in temperature can absolutely affect the POI. It's better if the gun has time to acclimate to the temperature before you try to zero.
Richard
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so I tore it down, cleaned everything and relubed as needed. shooting like a champ... go figure. no screws were loose and seal looked ok. fresh lube helped I guess. Im going to clean the barrel and check again when the rain stops. I plan to try crowning my muzzle also.