How do I read wind?

Reading Wind: A Complete Technical Guide

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Wind Reading Basics Wind Value (Full / Half / No-Value) Estimating Wind Speed Calculating Wind Holds Using Reticles for Wind Quick-Reference Wind Chart 

1. Wind Reading Basics

Wind is the largest variable affecting accuracy after your rifle is zeroed. Even a slight crosswind can move a bullet several inches depending on range, caliber, and BC.

To read wind correctly you must evaluate:

• Wind speed (mph)
• Wind direction relative to the shooter
• Crosswind value (how much of that wind actually affects the bullet)
• Distance zones — wind rarely matches at the muzzle and mid-range

Technical Notes: Taking a closer look at the chart (below), wind coming in at a 45° angle produces roughly 70% of full wind value—significantly more than the traditional 50% value that was taught in the past. 

Wind coming from the 8:00–10:00 or 2:00–4:00 directions is essentially Full Value and should be treated the same as a true 90° crosswind. 

Source: Snipers Hide. "The Modern Windrose." https://www.snipershide.com/precision-rifle/the-modern-wind-rose/

2. Wind Value: Full, Half, or No-Value Wind

Wind value is how much pushing force the wind applies based on direction.

Clock Direction	Wind Description	Value Applied
3 or 9 o’clock	Perfect crosswind	Full value (100%)
1, 5 , 7, 11 o’clock	Angled wind	Half value (~50%)
12 or 6 o’clock	Headwind or tailwind	No value (~0%)

3. How to Estimate Wind Speed

Mirage

• Boiling = 0–3 mph
• Wavy diagonal = 4–7 mph
• Flattened, angled hard = 8–12 mph
• Mirage disappears = 13+ mph

Vegetation Indicators

• Grass: 3–7 mph
• Branches sway: 8–12 mph
• Trees moving: 15+ mph

Environmental Feel

• 3–5 mph: Light face breeze
• 8–10 mph: Steady push
• 12–15 mph: Clothing flaps
• 20+ mph: Very challenging to shoot

4. Using Reticles to Hold for Wind

Wind holds should be made on the horizontal stadia, not dialed. This prevents mixing elevation and wind corrections and allows rapid follow-up shots.

Key Reticle Concepts

• MIL-based reticles (SCR2, SCR MIL, SCR 1/4 MIL): use 0.2 and 0.5 MIL marks
• MOA-based reticles (Wind MOA): use 1 MOA increments
• Holds move into the wind (hold left for a right wind, hold right for a left wind)

5. Calculating Wind Holds 

We recommend using a ballistic calculator to generate a dope card for your wind holds. 

Burris Ballistic Tools 

Assume a 10 mph full-value wind from 9 o’clock and a common caliber like:

• 6.5 Creedmoor Hornady ELD-M (140gr)

RANGE	ZERO ADJ	DRIFT
(YARDS)	(MILS)	(MILS)
100	0	0.1
125	0.09	0.2
150	0.22	0.2
175	0.36	0.2
200	0.51	0.3
225	0.67	0.3
250	0.85	0.3
275	1.02	0.4
300	1.21	0.4
325	1.4	0.4
350	1.59	0.5
375	1.79	0.5
400	1.99	0.5
425	2.19	0.6
450	2.4	0.6
475	2.62	0.6
500	2.84	0.7

5. Using Reticles to Hold for Wind

Wind holds should be made on the horizontal stadia, not dialed. This prevents mixing elevation and wind corrections and allows rapid follow-up shots.

Key Reticle Concepts

• MIL-based reticles (SCR2, SCR MIL, SCR 1/4 MIL): use 0.2 and 0.5 MIL marks
• MOA-based reticles (Wind MOA): use 1 MOA increments
• Holds move into the wind (hold left for right wind, hold right for a left wind)

6. Quick-Reference Wind Chart (Full Value)

Practical Example

A 10 mph crosswind at 500 yds produces an actual drift of 0.7 MIL. On the SCR2 grid, hold at the nearest 0.2-MIL increment — 0.8 MIL into the wind. This gives you a practical, easy-to-see aiming point that closely matches your true wind value.