Elevation change do to cross wind.

[BBob]

For most hunters, it don’t matter… and you can’t shoot good enough to see it. I can’t.

Exactly!

 

[Formidilosus]

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Fairly new to shooting but is there actually 4” of elevation change at 300 yards depending on cross wind direction? Shooting a 300 rum nosler accubond 200gr (.588 g1 bc) at 3100 fps.

No, that is not correct and has been discussed multiple time times. A 10mph, nor a 40mph cross wind causes a 4” vertical shift at 300 yards. People want to mentally masturbate to long range shooting and try make it complicated- see this thread and ballistic minutia that is functionally useless.

Hornady 4dof way overstates several things. Trash the app and go with another.

 

[Jared8054]

Yes, but a 10mph wind at 300 yds still won't amount to anything like a 4"elevation change. There will be a tiny amount but hardly enough to even see or care about in a hunting situation. No idea why Hornady is showing that much of an error but it seems a common complaint when using the Hornady 4DOF and a non-Hornady bullet.

Yeah I ran the ballistics online on a computer and proceeded to immediately delete the Hornady app. Thanks for the insight though.

 

[Rotnguns]

Yeah I ran the ballistics online on a computer and proceeded to immediately delete the Hornady app. Thanks for the insight though.

Jared, here is a link to a very informative exchange about the effect of crosswind on vertical deflection of a bullet, from a forum regarding precision shooting:

https://forum.accurateshooter.com/threads/crosswind-effects-on-vertical.3972006/

These guys include F-class competitors who are highly focused on minimizing even minute deviations at surprisingly long ranges. Bryan Litz, a well-known ballistician and author, is quoted as estimating that vertical bullet deflection is roughly 10% of horizontal wind deflection, but I could not find the direct quote, and there are many factors at play, such as bullet shape, mass distribution, etc.

Edit to add: found this trajectory model for a 7.62 mm bullet with muzzle velocity of 2650 ft/sec. Model was provided by one of the ballisticians that frequents the site:

the red line is the .10 (10%) ratio of vertical to horizontal wind deflection. Keep in mind that the wind deflection near the muzzle is very tiny, so the large ratio there doesn't mean much. It has, however, been pointed out that the general curve shape applies to many different bullets, and .22 precision shooters, most concerned with ranges of 50 - 100 yards, noted that the effects on their bullets are real and have been recognized for quite some time.