Short answer: with a 2-inch-high-at-100-yards zero, your bullet will be roughly 4 to 10 inches low at 300 yards, depending on cartridge, bullet weight, muzzle velocity, and sight height. A typical .223 Remington 55-grain load at about 3,240 fps lands near 6 inches low; a .308 Winchester 168-grain match load near 7 inches low; a fast 6.5 Creedmoor near 5 inches low. The exact number comes from your ballistic solver, not a rule of thumb. The turret setting alone does not determine the answer; the trajectory curve between 100 and 300 yards does.
What the 2-inch-high zero actually means
A scope turret moves the reticle relative to the bore, and the turret zero is just the point where line of sight and bullet path cross on paper. When your group center sits 2 inches above point of aim at 100 yards, the barrel is angled slightly upward relative to the sight line. That upward angle continues past 100 yards, so the bullet keeps rising before gravity wins.
This is why the "2 inches high at 100" setup is not a 100-yard zero. It is a zero somewhere beyond 100 yards. Most centerfire rifles with a 2-inch-high-at-100 setting cross the line of sight again between 170 and 230 yards, then fall below it. The turret clicks you dialed at 100 yards do not change the shape of the trajectory; they only shift the whole curve up or down on the target.
Scope height matters more than most shooters expect. A 1.5-inch sight height above bore versus a 2.5-inch height changes the near-zero distance by 15 to 25 yards on a typical centerfire. The turret tracks elevation relative to the reticle, so taller rings tilt the bullet path upward relative to the sight line and push the far zero farther out.
The elevation turret itself is a mechanical device. Each click equals a fixed angular change, commonly 0.25 MOA or 0.1 mil. At 100 yards, 0.25 MOA is about 0.26 inches; at 300 yards, the same click moves impact about 0.79 inches. That scaling is why dialing 4 clicks at 100 yards is not the same correction as 4 clicks at 300 yards.
The trajectory curve between 100 and 300 yards
Bullet drop is roughly quadratic in time of flight, not linear in distance. Over the first 100 yards, a typical centerfire bullet drops only a few inches. Between 100 and 300 yards, the drop accelerates because velocity bleeds off and gravity has more time to act. This is why extrapolating "2 inches high at 100 means 6 inches high at 300" is wrong.
Take a .223 Remington 55-grain at 3,240 fps with a 2.5-inch sight height and a 2-inch-high-at-100 setting. The bullet peaks around 140 to 160 yards, then falls. At 300 yards it lands roughly 5 to 8 inches low. A .308 Winchester 168-grain at 2,650 fps with the same setup lands roughly 6 to 8 inches low at 300. A 6.5 Creedmoor 140-grain at 2,700 fps lands about 4 to 6 inches low. These are solver-derived estimates; real numbers depend on your chronograph data and environmental conditions.
The counterintuitive detail: a flatter-shooting cartridge can be more sensitive to a 2-inch-high setup at 300 yards, not less. Because the bullet rises faster and peaks farther out, the far zero can sit beyond 300 yards, so the 300-yard impact may be closer to line of sight than a slower cartridge's. Faster bullets do not automatically mean more drop at 300; they mean the whole curve shifts.
A useful mental model: the 100-yard group tells you the slope of the trajectory near the muzzle, not the height at distance. The turret setting shifts the slope; gravity bends the curve. To predict 300 yards, you need the curve, not the slope alone.
| Setup | Approx. drop at 300 yd vs. 2-in-high-at-100 | Notes |
|---|---|---|
| .223 Rem 55 gr, ~3,240 fps | 5–8 in low | Common varmint/AR load |
| .223 Rem 77 gr match, ~2,750 fps | 8–12 in low | Heavier bullet, slower |
| .308 Win 168 gr, ~2,650 fps | 6–8 in low | Typical precision rifle |
| 6.5 Creedmoor 140 gr, ~2,700 fps | 4–6 in low | High BC, flat curve |
| .30-06 180 gr, ~2,700 fps | 6–9 in low | Hunting load |
| .22-250 55 gr, ~3,700 fps | 4–6 in low | Very flat, far zero long |
Why cartridge and environment change the answer
Ballistic coefficient (BC) governs how quickly a bullet loses velocity, and velocity loss drives drop. A high-BC bullet like a 6.5mm 140-grain holds speed better than a blunt 55-grain .223, so its trajectory flattens at distance. At 300 yards, BC can swing impact by 2 to 4 inches between otherwise similar loads.
Muzzle velocity is the largest single variable. A 100 fps difference in muzzle velocity shifts 300-yard impact by roughly 1.5 to 3 inches on a typical centerfire. That is why factory velocity on the box is a starting point, not a measurement; your barrel length, temperature, and lot-to-lot variation move it.
Air density changes the curve. Cold, dense air increases drag and drop; hot, thin air reduces it. A 40°F temperature swing can move 300-yard impact by 1 to 2 inches on a .308-class load. Altitude does the same: 5,000 feet of elevation gain can flatten the curve by 1 to 3 inches at 300 yards. Humidity has a smaller effect, usually under an inch.
Wind is the wildcard. Drop is predictable; drift is not. A 10 mph full-value crosswind moves a .223 55-grain by roughly 10 to 14 inches at 300 yards, dwarfing the elevation question. If your 300-yard group is 8 inches low but 12 inches left, the wind is the dominant error, not the turret.
Scope height and cant also matter. A canted rifle rotates the entire trajectory plane, pushing impact left or right and slightly changing vertical. A 2-degree cant can move 300-yard impact by about an inch. Level the reticle before blaming the turret.
Edge cases that break the simple answer
A 2-inch-high-at-100 setting is not always a "near zero plus 2 inches." If the rifle was zeroed at 200 yards and then dialed up 2 inches at 100, the 300-yard impact differs from a rifle zeroed at 100 and dialed up 2 inches. The turret does not remember history; the scope only knows the current angular offset.
Bullets that are barely stable or over-stabilized behave differently. A marginally stabilized bullet may show larger dispersion at 300 yards that masks the true drop. A very heavy-for-caliber bullet at low velocity may drop 15 to 20 inches at 300 from the same 2-inch-high setup.
Barrel harmonics and receiver flex can shift point of impact between 100 and 300 yards in ways a solver cannot predict. If your 100-yard group is tight but 300-yard groups are scattered, the problem may be the rifle, not the trajectory.
A 2-inch-high setting is also risky for hunting if you do not know the far zero. If the bullet is still rising at 200 yards and your far zero is 250, a 300-yard shot may be 6 inches low, but a 150-yard shot could be 3 inches high. The ethical question is not "where will it be at 300" but "where is it at every distance I might shoot."
Red-flag warnings: Do not trust a 2-inch-high-at-100 group to predict 300-yard impact without live confirmation at 300 yards. Do not assume a turret click value without checking the scope manual; some turrets are 1/4 MOA, some 0.1 mil, some 1/8 MOA. Do not mix bullet weights or lots without re-verifying the zero and the 300-yard impact. Do not shoot at game at 300 yards based on a paper calculation alone; confirm on steel first.
Misconceptions worth correcting
Misconception one: "2 inches high at 100 means 2 inches high at every distance." Drop is not linear. The bullet rises past 100 yards on most centerfire setups, peaks, then falls. A 2-inch-high group at 100 could be 3 inches high at 150, near line of sight at 200, and 6 inches low at 300.
Misconception two: "The turret setting is the zero." The turret setting is an angular offset. The zero is where the bullet crosses the line of sight, and there are usually two crossings: a near zero and a far zero. A 2-inch-high-at-100 setup typically has a far zero between 170 and 230 yards depending on cartridge.
Misconception three: "A ballistic calculator replaces range time." Solvers are excellent interpolators and poor substitutes for confirmed data. Your chronograph, your barrel, and your scope height must be measured, not guessed. Garbage inputs produce confident garbage outputs.
Misconception four: "Higher velocity always means less drop at 300." A faster bullet drops less over the same time of flight, but it also reaches 300 yards sooner, so the comparison is not apples to apples. The net effect is usually less drop, but the curve shape and far zero shift can surprise you.
Practical actions to pin down your 300-yard impact
Record your exact load: bullet make and weight, powder charge, primer, case, and cartridge overall length. Without this, you cannot reproduce the result. Measure muzzle velocity with a chronograph over at least 10 shots. Use the average, not the box claim. Note the temperature and altitude. Measure sight height from bore center to scope center, typically 1.5 to 2.5 inches. Enter it into the solver. Confirm your 100-yard zero on paper, then confirm the 2-inch-high setting with a second group. Note the turret click value from the manual. Shoot a 300-yard group on steel or paper, ideally 5 to 10 shots, and record impact relative to point of aim. Compare to the solver prediction. Adjust the solver inputs until prediction matches observed data within 1 inch. Then trust the solver for intermediate distances.
Thresholds to reconcile: a 1-inch error at 100 yards can become a 3-to-4-inch error at 300 yards; a 100 fps velocity error can become a 2-to-3-inch error at 300; a 1-inch sight-height error can become a 2-to-3-inch error at 300. Reconcile these by confirming at 300 yards, not by averaging solver outputs. If your observed 300-yard impact disagrees with the solver by more than 2 inches, find the input error before dialing correction.
Timeline table for a typical range session:
| Step | Time | What you confirm |
|---|---|---|
| Chronograph 10 shots | 15 min | Average velocity, SD |
| 100-yard zero group | 10 min | Point of impact vs. aim |
| Dial to 2 inches high at 100 | 5 min | Turret click count |
| 300-yard group | 20 min | Actual drop vs. prediction |
| Solver reconciliation | 10 min | Input correction |
| Re-shoot 300 to verify | 15 min | Prediction within 1 in |
Limitations and what the numbers cannot tell you
The estimates above are solver-based ranges, not measurements from your rifle. Real 300-yard impact depends on your barrel, your ammunition lot, your scope tracking, and your shooting position. A turret that does not track true, a reticle that is not level, or a shooter with inconsistent cheek weld can add 2 to 4 inches of error at 300 yards independent of trajectory.
This article is general educational information about external ballistics, not a shooting instruction, safety plan, or hunting recommendation. It does not promise any specific point of impact or outcome. Consult a qualified instructor or ballistician for your specific rifle and load, and follow all local laws and range safety rules.