dk, didn't see this but IMO shooting at vermin or paper at as far as you can see them is OK with me. There are some folks here in the farmlands of PA that shoot groundhogs at over 1000 yds.
But to shoot at a bull elk at 750 yds is just irresponsible. One, there are not many cartridges out there that have enough energy at that range to be effective on a 'marginal' shot. I wouldn't shoot at one over 400 yds. If you can't get closer to a bull elk than 750 yds, you should't be hunting them.