I have a sporter, what exactly is your problem, is it because the barrel is a light barrel (small diameter). And the sensor is too near to the flight of the bullet.
Steve
Nightforce nsx12x42x56 for sale, very good condition. Ch2 reticle,. Comes with box and original scope covers plus butler creek for rear. £1200.
Tried to upload more photos, but won't let me, if interested I will email further photos.