Is it normal for an air rifle's scope to have to be re-zeroed after it has sat for a few weeks? I've noticed if I do not use my .177 HW97K for a few weeks or a month or so, the next time I go to use it it is usually up to an inch or two off from being calibrated at 20yds. I have an Aztec Optics 5.5-25x50 scope on it and I don't understand why I have this problem. I feel like I am always fiddling with changing the ammunition, the way I hold it, re-zeroing the scope, etc. but nothing seems to help.
I've tried at least 10 different types of ammunition and currently it seems to like H&N Sport FTT 8.64gr. I will zero the whole setup at 20yds until I am shooting pellet on pellet then get bored and take a few weeks off. The next time I go to use it, it will shoot high left, or high right and I have to re-zero the scope.
Even if I use it regularly, within 3 months or so it will start to drift out of calibration and I will need to re-zero the scope. I don't think it is the scope, and I don't think it is the rifle, but I have to assume it is one of them. So my question is, does anyone else have this problem or is it normal to have to rezero a scope every few months?
I've tried at least 10 different types of ammunition and currently it seems to like H&N Sport FTT 8.64gr. I will zero the whole setup at 20yds until I am shooting pellet on pellet then get bored and take a few weeks off. The next time I go to use it, it will shoot high left, or high right and I have to re-zero the scope.
Even if I use it regularly, within 3 months or so it will start to drift out of calibration and I will need to re-zero the scope. I don't think it is the scope, and I don't think it is the rifle, but I have to assume it is one of them. So my question is, does anyone else have this problem or is it normal to have to rezero a scope every few months?