Recently overheard this:
Sighting-in a high caliber rifle (.30-06, 270, etc.) to hit dead on @ 25 yds whereby the bullet is 'sposed to hit 1" to 1.5" high @ 100 yds....dead on again @ 200 yds...?
Allegedly a technique to acquire reasonable bullet placement when a 100 yd range is unavailable.
Can any of you fine fellas comment thereon?