I think you guys have figured it out. I "do" line up my sight housing everytime so maybe a slight change in my anchor pt as I shoot longer distances.

Dan

the farther my pins are goin the farther the gap is.

which is how it theoretically should be. But as we see from mfd's case, there are ways that slight nuances in anchor can make that theory a wash.

If you are doing it consistent (lining up with the sight) adn that is how you do it EVERY time, then their is no need to worry about your accuracy. As long as your slight change in anchor happens the same everytime, you will be able to be as consistent as any... The only place I could see this being a problem is in a treestand b/c that minor anchor flaw could get worse etc. Im sure you know that tho so no biggie.

Good luck!