Not shooting the 80's, but the 87's atop reloader 17 in a 24" barreled 6 creedmoor are doing 3350, and shooting very accurately out to 6-700 yards. Likely will do well further if the wind isnt kicking up too bad
Very deadly on coyotes, but because of the thin jacket and 20 grains less weight, not as good a signature on steel targets when you get out to 700 ish yards compared to 108/109 grain ELDs that I also shoot.
Based on some of the above posters results or lack thereof, and the fact that I got 87's on sale recently at PV, I'll probably not try the 80 grain boolitz.