first of all, an inaccurate gun with a good shooting is the same as an bad shooter with an accurate gun... so you have to perfect your technique no matter how accurate your rifle is to get the most out of it.
Gamos tend to be inaccurate in the first place, some stay that way, some get better as they break in... if your gun breaks in well, then you should be able to get half inch groups at 20 yards... and maybe 3/4 inch groups at 30 yards... I used to be able to do that with my gamo s1k, but that gun was a gem ever since I took it out of the box.
Let me give you a straight answer: shoot and find out... talk to guys that shoot springers and ask about technique... I think there are a few... I just hold the rifle as lightly as possible and let it do its stuff, but you should experiment with yours to get the best result.
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