I'm with some of the more seasoned LR guys on here, depends on the particular rifle/load and the conditions at the time. My longest to date is 1425 yards on a whitetail buck. My longest bull elk was 1006. I have a rifle that has the performance (external ballistics and accuracy) to kill way past that. Had a cow elk standing perfect broadside for several minutes at 1600 with about as perfect conditions as you could ask for, I didn't shoot because it just didn't feel right as I had only shot that load to 1300 (with scary accuracy the day before). I also hadn't been training all year like I would want. Like I have posted in the past, I've passed on <50 yard shots because things didn't feel right. If I'm not confident that I have a dead animal when I pull the trigger then the trigger doesn't get pulled. This year I have been shooting quite a bit at work & on my own and feeling pretty good. However, I may have to come up with another load for my rifle over the proven one due to availability of the bullet I've used. If I can get this thing going right and then proof it past 2000 yards, and it feels good at the time, who knows.