To me, with enter fire rifles, "long rage shooting" is anything from 500 yards to 2000 yards.
"Long rage shooting" with a handgun is from 75 yards to 250 yards.
"Long rage shooting" with a muzzleloader (firing round balls) is anything from 150 to 300 yards
I apply the NRA definition: Long Range is over 600 yards. 300-600 is Midrange.
I don't shoot rifles competitively, except amongst my friends, and most of them are better shots than I, so consider me a rank amateur. That said, my longest shot on a prairie dog to this point was last year at 487.5 yards (according to the laser rangefinder) with my essentially stock Ruger SR556E (Vortex 4x12 44mm scope, and a Geissele 2-stage trigger), which for that rifle I would consider that a long range shot.