I dont know what the specs are but I can tell you on a medium weight .308 and a Tikka T3 .270 eye relief has not been an issue at all. I actually use it quite a bit on 3x and 9x and have not had to make any conscious changes in head position regardless of magnification.

Hunt hard, kill clean, waste nothing and offer no apologies.

"In rifle work, group size is of some interest...but it is well to remember that a rifleman does not shoot groups, he shoots shots." Jeff Cooper