I've only been shooting with sights for a few months so I'm very much a beginner . I was shooting at 600yds today and had a problem that I need help understanding and correcting . I'm using a Redfield International rear sight with a Gehman 510 iris and a 22mm front sight with a Centra adjustable iris . When trying to get centered up for a shot my sight picture would become distorted as in my circles wouldn't be round . First time I have experienced this . So what causes this and what do I need to do ? Your help will be greatly appreciated .
Chris
Chris