28lx,
A 180 E-Tip started at 3100 fps (the probable muzzle velocity from a .300 Winchester Magnum) isn't going to be traveling 1800 fps at 800 yards. That's using actual range-tested BC info and environmental conditions for Grand Island, Nebraska.
It would if you were elk hunting in the Rockies at 9k'-11k'.
If at 9k' it would be doing 2102 at 800. 2169 at 10k. These are based on JBM and factory BCs. Litz BCs for Nosler bullets are sometimes a little lower and sometimes a little better so I won't automatically assume they would be worse. An E-Tip would not be my choice of a LR bullet, but the point is where you hunt can have a meaningful impact on what may be suitable. I'd rather see tests where the bullet is tested at an impact velocity(s) and then the reader can equate that to a range based on cartridge and conditions.
