"Given a 20-inch sight radius, which would be typical of a DR, the bullet will strike 1.8 inches to one side of the POI at 50 yds. Negligible!"

Marraki,

Your post, quoted above, mirrors the POI change that I have experienced. While you don't seem to think ~2" is much, I don't see the need to live with it since, given the same rifle and its given accuracy, you can eliminate the ~2" wandering POI by simply filing your bead. And when you do that, you will discover that the filed bead catches a heck of a lot more light and appears much larger for it, while still attneuating the smaller amount of target that the bead should.

JPK