Does Rain Lower Your Bullet's Point of Impact?

by
posted on July 31, 2014
** When you buy products through the links on our site, we may earn a commission that supports NRA's mission to protect, preserve and defend the Second Amendment. **
bs_2015_fs.jpg (9)

undefinedThe Myth
Shooting in the rain causes bullets to impact lower than normal.

The Reasoning
It's simple, right? A bullet flies horizontally, raindrops hit the bullet from above, imparting their mass on it, causing the bullet to fall faster and impact the target lower.

The Facts
Sometimes the physics are counter-intuitive.

Fact is, bullets normally impact higher than normal when it's raining, as anyone who has shot extensively in the rain knows. Why? As the NRA Fact Book states: "Changes in humidity have little effect on the air density, and thus on the flight of the bullet. Changes in barometric pressure, on the other hand, do have an effect. In general, fair weather is accompanied by a high barometer, which means more air density and more resistance to the bullet. Likewise, rainy weather is likely to occur at times of low barometer, when air pressure is low, producing less air density and resistance to the bullet. A drop of 1" in the barometric reading will increase the ballistic coefficient by about 3.33 percent."

The Answer
Shooting in the rain generally causes bullets to impact higher than normal, not lower.

And oh, what a glorious feeling ... to be shooting in the rain!

Latest

Lead Photo H2H
Lead Photo H2H

Head to Head: The 9.3x62 vs. 9.3x74R

A battle of 9.3mms. While this particular caliber never really caught on here in the states, it may be time for this old safari favorite to find its way into a few more gunrooms. Check out more about them here.

RCBS Released 7mm Backcountry Reloading Die

RCBS has announced the launch of its new 7mm Backcountry Die Set. Engineered specifically to meet the demands of reloading this high-performance cartridge, the RCBS 7mm Backcountry Die Set is a unique three-die system that includes a neck sizer die, expander die and bullet seater die. The set delivers enhanced control, consistency and accuracy when reloading the 7mm BC and the patented Peak alloy cartridge case.

Hodgdon Launches Accurate High Country Powder for 7mm Backcountry

Hodgdon Powder Company have introduced Accurate High Country, an all-new spherical rifle propellant engineered for the performance demands of today's modern magnum cartridges, including Federal's new 7mm Backcountry.

IWC and Guidefitter Honor 2026 Game Warden of the Year

International Wildlife Crimestoppers (IWC), in partnership with Guidefitter, named Senior Conservation Officer Meghan Roos of the Idaho Department of Fish and Game the recipient of the 2026 IWC Guidefitter Game Warden of the Year Award. Officer Roos received the award during International Wildlife Crimestoppers’ annual conference in July.

#SundayGunday: Chiappa USA Rhino 60DS

On this week's #SudnayGunday, we’re checking out the Chiappa Rhino 60 DS. All it takes is once glance to tell this is not your granddad’s revolver. Chiappa has flipped the script on wheelguns quite literally, aligning the barrel with the bottommost chamber of the cylinder, rather than the top. This low bore axis makes the gun recoil directly back into the hand, rather than pulling the muzzle up and away from your grip. Learn more about it in this exclusive video.

Shooting Close: How to Play the Short Game

The trend these days is to “go long” but the truth is, if you’re doing it right, most shots taken by hunters are anything but long range. You’re better off practicing your short game.

Interests



Get the best of American Hunter delivered to your inbox.