Sorry, but this is a little off topic. I owned two of these scopes and I did not have any problems with eye relief on either one. But I didn’t like the short range of parallax adjustment. My scopes could adjust parallax down to a very short distance(way less than 50 yds), but parallax adjustment would max out just north of 300yds. I sent one scope back to Nightforce thinking there may be something wrong and asked if the range could be adjusted. Didnt make much difference. A second one that I bought was exactly the same. Very limiting ability to correct for parallax if you plan on shooting longer distances.
When I compare that to other scopes I own like SWFA and Bushnell LRHS, those scopes have very wide ranges of Parallax adjustment. I’m not sure what’s different in the designs that would cause this limitation.
Just some added information in case it’s important to you.
I've found the 2.5-10x42 NXS to be very parallax sensitive. I think Nightforce really focuses on resolution and in this model the parallax across power ranges, focus settings, and distance is very touchy because of it. Not unusable, but it seems to me that with any change in range or change in power at a specific range, the parallax has to be adjusted to it for the most resolution. In some cases it makes a big difference in regards to not only parallax but also clarity of the image. I've not noticed this (resolution of image, not parallax) to anywhere near this extent in other scopes. I don't remember having a parallax problem with it at 500 but I've also spent a lot less time shooting it at that distance than at 300, were I spend most of my time.