Add the bullet's spin drift to Coriolis drift, and rightward horizontal deflection at 1000 yds can be ~9-10", in my real life experiences - which pretty closely match the Patagonia Ballistics LoadBase 3.0 predicted magnitudes of rightward drift.
When I experienced the equivalent of ~ 1moa (10") combined Coriolis and spin drift at 1000 yds, I decided it was time to factor the dope into my long range shots. 10" of horizontal drift is enough to turn an otherwise good hit into a marginal hit on deer/sheep/goat/black bear/caribou-sized game animals. These two sources of horizontal deflection affect each and every shot, so factoring in the compensating dope was a straightforward decision for me. But I've exchanged posts with guys in the past that either don't believe these sources of drift exist, or if they do exist, claim the wind is their more significant source of horizontal drift. I don't take really long shots if it's very windy, so Coriolis and spin drift are often the sole cause of my windage dope on the windage turret. That, or their required dope on the windage turret is similar to the wind required dope.