Originally Posted by henryc
It's a mk1, I range on full. shoot at 25, out doors
Have you tried it at 10x for the near ones in lieu of your normal 25x to explain a bit more. I shoot BR with a Nightforce BR scope at 20m it really only parallaxes down to about 21 at that level its right on its limits. The 20m target bull and centre pip gets a two ring effect I have to guess which one to aim at - not ideal in BR!- I address that with a 50ft reducer which sorts it out - but I have in the past forgotten it and had to shoot my cards without - my experience is that at a scopes limit of parallax it seems you can introduce variances in sight picture. I mitigate it by winding back on the mag!