I have a friend that killed an elk at 70 yards. If I was sure of the range I think I could be effective at 60 yards, and I had a 60 yard pin for elk hunting.
I have probably been within 75 to 100 yards on a dozen 6X6 or better herd bulls over the years and it never occurred to me to try a shot.
At least they are not likely to jump the shot, so you are limited to your shooting ability and whether whatever you are using still has enough energy.
Point is that even though an elk is bigger you can make a longer shot because they are not so agile as a deer.
I have probably been within 75 to 100 yards on a dozen 6X6 or better herd bulls over the years and it never occurred to me to try a shot.
At least they are not likely to jump the shot, so you are limited to your shooting ability and whether whatever you are using still has enough energy.
Point is that even though an elk is bigger you can make a longer shot because they are not so agile as a deer.