I have seen where folks are hitting coyotes with Pulsar Apex XD50a at 200 yards. It is a bit of an iffy process in the sense that you can't tell if it is a coyote or a fox or what, but you can tell the movement is canid. A guy up in Colorado that I am in touch with is hitting coyotes at 350 yards with the IR Hunter MKII 2.5x. As you saw above, I could have taken the coyote with the MKIII 4.5x at 325 yards (and certainly much farther) if I had a clue where my bullet was impacting at that distance. The video showed deer at 800 and I bet I could ID a coyote at that distance. IIRC correctly, my longest coyote kill with an Armasight Zeus 3 was 200 yards, but it could have been farther (capability-wise)...
https://youtu.be/_pororI4gWA
I have seen/identified coyotes at over 400 yards with the Zeus 3, but I don't shoot that far.
One of the problems with assessing "maximum range" is that ambient conditions come into play and can really impact distance. Another problem is that most shooters either do not state the distances of their kills or state them but you don't know how accurate the assessment really is. Some folks are prone to improper estimation. What I am telling you here are maximum distances that I know of personally or believe the user to be credible in his assessment. That does not mean these are the maximum distances for the scope, although it probably is close on the Pulsar Apex XD50a.
You can move the crosshairs in any of the scopes, but it is not what I could consider to being a particularly dial-friendly experience for long range shooting, no.
Rangefinding? The MKIII scopes have a stadiometric rangefinder. I don't trust it. For example, I don't know how it would know the difference between a 200 lb pig at 200 yards and a 400 lb pig at 400 yards.
geo, I do know people who take off scopes and use them as monoculars. I think it is a really bad idea. Before anyone gives me hell for not having faith in the gear and manufacturer promises of return to zero mounts, I have seen problems happen several times with clip-on thermals that go in front of daylight scopes and with a couple of guys that regularly move their scopes between rifles. It is my opinion as I have seen problems in the field. Maybe the user gets in too much of a hurry and doesn't get the scope on just right in the dark. I don't know, but the result is that the user was unable to hit the target and follow verification produced the same error. Several scopes have multiple rifle settings so that you can move a scope between rifles. I think that is fine, but that the user should shoot a verification shot to be sure the scope is ON.
Personally, I like the idea of the multiple rifle settings to be used as settings for different types of ammunition. Without ever adjusting the zero, you can flip between rifle settings such that you can use your light bullets (e.g., Rifle Mode 1) and change to your heavy bullets (e.g., Rifle Mode 2) without having to remember the difference between them. In other words, in less time it would take you to change ammo in the gun, you could go from your coyote ammo zero to your hog ammo zero.
With that said, if you move your scope between rifles without verification or are taking off the scope and using it as a monocular and you are happy with the results, great. I just don't trust the process. I will point out that you don't see many serious hunters doing this with their daylight scopes.