[quote=prm]Having actually shot with one, it really isn't that big of a deal, at least not with a 6.5 Creedmoor. Glass is nice, seems to track well based on a few groups dialing between shots. Eyebox is a finicky above about 8x. The eye relief is bigger deal in the initial positioning than with the shooting. Need to ensure the forward scope ring is far enough back. it is a tiny, lightweight scope.
The biggest caliber I have it one so far is the 7.62x54R and I did not get hit with the scope. Right now, I am setting it up as a backup for my 280Rem, but I have not fired it on that gun yet. I do not anticipate issues, but we'll see. I tend to have backup scopes pre-zeroed for any rifle I might take anywhere aside from the range with me and the ultralight is an interesting backup scope given how little weight it adds to my pack.
I have now seen three samples and they all stayed zero'ed and tracked correctly. With an ultralight design I always worry about these things, so I'll keep torturing it and see how it holds up.
ILya