Andy, with my memory, sometimes I "remember" things that weren't necessarily so.
If that is the case with the sight blades, I apologize. I could easily be wrong about that. I thought those guns came with the four patridge blades I described, a red damp, and a Call or McGivern Gold bead. It's been years since I saw one. I may be thinking of another model. A WAG is the proverbial wild-axx guess, which we dare not be too direct in saying on the boss' family-friendly forum.
I went back and read your original post, after looking at the other answers you received. I hope my comments didn't cause more confusion than they helped. Basically, to repeat, I don't believe you are going to see a lot of difference in your 50 yard zero with the 210 gr. vs 240 gr. loads and that long barrelled gun. Let us know how it works out.