My favorites:
1. 30-06 Standard Handi, I started out with Remington 150gr Core locks. Then went to shooting handloads. At 100 yards all holes are touching. At 300 yards I can hit a 4" clay target every shot. At 500 yards I can hit a 1 gal milk jug every shot.
2. .223 Ultra, I shoot Ultra Max reloaded ammo. 55gr Nosler Ballistic tip. Again I don't measure, but all the holes are inside the black square on the sighting in target at 100 yards, most are touching. At 400 I can hit a 4" clay target every shot. I seldom try shots beyond 400 yards with the .223.