During a hunt this year, my brother and I were discussing the phenomenon of equipment getting better resulting in more game being taken.
Through the course of our hunt we talked to several hunters who took very large bulls and bucks at distances of 5-700 yd; we also fit into this stat as we took an elk at 600 and a deer at 475. I've been western big game hunting for 25 years, and maybe it's just me, but up until about 8-10 years ago, it was pretty rare to hear of people downing game beyond 500 yd. Even 500 was too long of a poke for many, if not most, and many stories circulated camps and conversations about the big one that got away due to it being just out of range. Due to LRF and better shooting equipment, a certain number of those animals that used to be out of range are now getting killed.
I watched the same thing happen with archery going from rudimentary compounds to 300 fps+ to now crossbows in many jurisdictions. I'm not going to comment much on the proliferation of increased effective range, other than to say that I hope tag allotments take increased killing efficacy into account.
I, too, wonder how they can establish how much game has been harvested with the survey techniques many departments use. IIRC, I've been called 1 time and received a survey postcard a time or two after buying upwards of 30-40 tags over the past 25 years. I get that harvest quota is established by how much game inhabits a certain region, not on how much was taken, but how can they accurately decide how many tags to give if they don't have accurate hunter success ratios?