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Your scope is mounted about 1.5" above the centerline of the bore. The bullet leaves the muzzle 1.5" lower than your line of sight. Most people don't realize it, but the muzzle of the rifle is slightly elevated compared to the breach so the bullet leaves traveling in at a very slight upward angle and will travel in an arc. You have the rifle zeroed at 25 yards where the bullet crosses your line of sight going up. At some point it will reach it's apex and begin to fall. When it reaches it's apex, is where you want to zero. 25 yards is way too close.
Most people zero at 100 yards. That means the bullet will be about 3/4" to 1" low at 25 yards and about 1/4" low at 50 yards. At right around 100 yards you'll be at the bullets apex and beyond 100 yards the bullet will be below your line of sight.
Some people zero at 200-400 yards, but that causes your bullets to be several inches high at 100-200 yards. By zeroing at 25 yards you were effectively also zeroing at about 300 yards.
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"If you're still doing things the same way you were doing them 10 years ago, you're doing it wrong"
Winston Churchill
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