Aim Higher in Rain or Fog?

by
posted on June 7, 2011
bs_2015_fs.jpg (3)

True or False: You should aimhigher in rain and/or dense fog because humidity increases air resistance.

The Expert Deferral: "The Bullshooter’s Bible" (aka, the NRA Firearms Fact Book) says:

"Many target shooters have noticed that bullets seem to impact higher on the target when fired in rainy conditions. 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 in 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 1/3 percent."

The Second Opinion: While numbers don't lie, several retired Navy SEALS have been operating a long range shootingschool for hunters, called the Sportsmans All Weather, All Terrain (SAAM) course that's offered atTexas' FTWranch. The SEALSconfirm that humidity occurs in times of LOW pressure and does not effect bullets like high barometric pressure does.However, after 600 students and several tours in the desert, they have also learned some practical lessons; afterall, that's what the class is all about. And one of those is: For hunting ranges, shots inside of 600 yards or so, the hunter shouldn't worryabout compensatingfor air pressure.

Conclusion: False. In fact, it's the opposite, but hunters shouldn't ever worry about rain. And If you don’t believe the Fact Book, believe our Navy SEALs.

Latest

001 4BBT Holster 01
001 4BBT Holster 01

4 Reasons Big-Bore Revolvers Are Still Ideal Trail Guns

Although semi-automatic pistols have a place in the trail gun line up, revolvers still have their advantages.

First Look: Rise Reliant Bolt-Action Trigger

Rise Triggers has entered the bolt-action market with its first-ever trigger for the Remington 700 platform: the Reliant Hunter and Reliant Pro triggers.

NRA Announces New Club Leadership & Development Online Course

The National Rifle Association of America is pleased to announce the release of its newly revised edition of the NRA Club Leadership & Development Online Course.

USDA Order is a Win for Wildlife

Late last month, the U.S. Department of Agriculture (USDA) issued a memorandum to conserve and restore wildlife habitat connectivity in the United States, directing agencies within the USDA to consider habitat connectivity in planning and programs in a manner that recognizes State and Tribal authorities and respects private property rights.

Review: Beretta BRX1

Beretta calls the BRX1 the fastest manually operated repeating platform on the market. Quick barrel, bolt and magazine swaps and adjustable ergonomics make it a distinct alternative to the classic turn-bolt for just about anyone, and ambidextrous controls make the rifle an attractive choice for lefties.

Are Premium Steel Waterfowl Shells Worth the Price?

With prices approaching those of bismuth—a superior shot-making material—are top-tier steel loads worth the cost? Here is what you need to know to make an informed decision.

Interests



Get the best of American Hunter delivered to your inbox.