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Trajectory calculator

Drop, wind and velocity out to distance, with the atmosphere you are actually shooting in. Change anything and the table updates.

Bullet and load

Bullet weightgr

Muzzle velocityfps

From a chronograph if you have one.

Ballistic coefficient

Drag model

Use the BC that matches the model. Most long boat-tail match bullets list a G7 value; the G1 number on the box is usually higher.

Rifle and zero

Sight heightin

Bore center to scope center.

Zero rangeyd

Conditions today

Altitudeft

I zeroed in different conditionsMatters most for a long zero range.

Wind and angle

Wind speedmph

Wind fromo'clock

Facing the target: 12 is ahead of you.

Shot angledegrees

Uphill positive, downhill negative.

Table range

Out toyd

Everyyd

Advanced: spin drift and Earth rotation

Fill in all three to add spin drift and a stability check. Fill in both to add the Coriolis effect. Leave blank to skip.

Barrel twistin/turn

1:12 is 12

Bullet lengthin

Caliberin

.308

Left-hand twist

Latitudedegrees

North positive, south negative.

Direction of fire° from north

East is 90, south 180.

Density altitude

0 ft

Air density

100.0%

of standard

Speed of sound

1116 fps

Zero angle

4.0 MOA

bore above sight line

Drop and wind table

Trajectory by range
Range yd	Drop in	Elev MOA	Vel fps	Energy ft·lbf	Time s
100	0.0	0.0	2417	2269	0.120
200	-4.5	+2.1	2241	1951	0.249
300	-15.9	+5.0	2073	1670	0.388
400	-35.4	+8.4	1913	1422	0.538
500	-64.4	+12.3	1758	1201	0.702
600	-104.7	+16.7	1610	1007	0.880
700	-158.4	+21.6	1467	836	1.076
800	-228.4	+27.3	1330	687	1.290
900	-318.1	+33.8	1201	560	1.528
1000	-432.0	+41.3	1088	460	1.791

Elevation: positive means dial or hold up. Windage: positive means dial or hold right. Drop and drift are the bullet's position relative to your line of sight.

Transonic warning. From about 800 yd the bullet is below Mach 1.2 and goes subsonic by 1000 yd. Drag changes fast there and real bullets can be less predictable than any calculator. Confirm at the range.

Predictions use the standard G1 or G7 drag model with the physics checked against an independent solver, but real bullets differ from their listed BC. Treat the numbers as a starting point and confirm at the range. SureHold never suggests loads; always follow published load data and safe firearm practices.