One of the things you are not telling us, is how and with what support, are you obtaining your groups.
Are you using a rest? front and rear? unsupported?
With a bity little carbine there is a tendency to 1. flinch- high shots, 2. lift your head-low shots, 3. anticipate the recoil-left shots(right handed) and 4. muscle the gun-right shots.
More information before you blame the tool.