IBM, the chances are that the barrel may be slightly bent to the right on your carbine, or that it has been rebarrelled and the new barrel has been nipped up a fraction too far. This would have the effect of positioning the frontsight blade slightly to the left of the bore, making the rifle shoot to the right. You can check this by stripping your carbine and placing paralells on the barrel flat and action flat on the underside. If all is correct they will be in line. Either of these problems can be easily corrected.