I ordered a Riflesmith Short Staff Hunter, for my Winchester 76, from Buffalo Arms. After shooting it couple of times. I felt the eye hole on the cup was not flexible enough for different types of lighting( cloudy, sunny, rain ), or days when my eyes were stronger or weaker, etc.
I did some research and felt that the Hadley Eye Cup, which has a number of different setting for the eye-hole, was what I needed. Buffalo Arms did the research and found the one that fits the Riflesmith Short Staff Hunter and I got it.
I am most pleased with it.

But now, I am worried that I may have to replace my Peep Tang sight on my Chaparral!

Oklahoma Dee