Adjusting for changes in elevation. (Shooting Tip).AT HIGH ELEVATIONS the air is thinner and gravity loses a small percentage of its pull. Every projectile projectile something thrown forward. projectile syringe see blow dart. projectile vomiting forceful vomiting, usually without preceding retching, in which the vomitus is thrown well forward. slows down more gradually and takes a flatter line. While baseball's power hitters love the thin air of Denver's Coors Field • • [ , and professional golfers The list of golfers has been split into two articles:
The curve described by a body moving through space, as of a meteor through the atmosphere, a planet around the Sun, a projectile fired from a gun, or a rocket in flight. , reducing the effects of misjudged shot distances, but all too often the knowledge comes as a surprise at just the wrong time. If you hunt more than 2,000 feet above the elevation where your bow was sighted in, you will begin to notice that your arrows impact higher than normal. This can be a serious problem, especially for Eastern bowhunters heading for the timberline timberline, elevation above which trees cannot grow. Its location is influenced by the various factors that determine temperature, including latitude, prevailing wind directions, and exposure to sunlight. out West. The difference can be significant -- several inches for arrows fletched with vanes and even more for arrows decked with feathers feathers, outgrowths of the skin, constituting the plumage of birds. Feathers grow only along certain definite tracts (pterylae), which vary in different groups of birds. . Left unchecked, such a built-in accuracy bias can produce an outright miss, or worse. Of course, the real remedy for the problem is first understanding that it exists. After that, the physical solution is simple. Because the gap between sight pins is affected, you can't simply gang-adjust your entire sight head upward to account for the flatter trajectory. And resetting every pin individually is problematic in most hunting camps. Instead, focus on one of your longest pin settings. Let's assume that is 40 or 50 yards. Set out a target at that distance and shoot until you are comfortable that you are executing good shots. Then simply turn your limb bolts out (reducing draw weight) in small increments until you are hitting dead-on at this range. Make sure to turn both bolts an equal amount in order to preserve the original tiller setting. After making these adjustments, move up and check your shorter-yardage pins just to be sure everything is still tracking. Your 20-yard impact point may be slightly below the intended target, but the difference will be so small that it is insignificant. Not only is elevation an important consideration when preparing yourself physically for the mountain hunt of a lifetime, it must also be considered when preparing your bow. Adjusting your draw weight is a step that can make a big difference in the outcome of the hunt. |
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