This is different from our scope click calculator, which corrects a group you've already shot. This one works the other way round: tell it your rifle's numbers and your zero, and it predicts how much elevation you'll need at a longer range, before you've fired a shot there.
That prediction depends on real bullet physics — how fast it leaves the barrel and how well it holds velocity downrange — not just a simple angle conversion. So it needs a couple of numbers from your ammunition. The maths itself doesn't care what cartridge you shoot — there are quick-fill starting points below for .308/7.62 NATO, .223/5.56 NATO and .300 Winchester Magnum, and you can type in your own numbers for anything else.
Your rifle & load
Not sure which is yours? It's printed on the turret cap — e.g. “0.1 MRAD” or “1/8 MOA”.Come up this much
Full elevation table
Every 100 yards from your zero out to your target range, so you can see how it builds up.
| Range (yards) | Drop from bore | Come-up | Clicks |
|---|
How this works, in plain terms
Once a bullet leaves the barrel, gravity pulls it down and air resistance slows it down — and as it slows, gravity has more time to act, so the drop gets steeper the further it travels. That's why you can't just scale up a short-range correction for a long-range shot; the maths has to model the whole flight.
This calculator uses a standard bullet-flight model (the same kind used by most ballistic calculators) driven by your muzzle velocity and your bullet's ballistic coefficient, which describes how well it cuts through the air. It works out the angle your barrel needs to be zeroed at for your zero range, then follows the bullet's actual path out to your target range to see how far it's dropped below your line of sight — that gap is the elevation you need to dial.
This assumes standard atmospheric conditions (sea level, 59°F) and your quoted muzzle velocity and BC. Real-world come-up can shift a little with temperature, altitude and your individual rifle, especially past 600–700 yards — treat this as a strong starting point, confirm with live fire, and adjust from what you actually see on the day. If in doubt, ask one of our coaches.