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Long Range Hunting & Shooting
Elevation and ballistics
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<blockquote data-quote="Mysticplayer" data-source="post: 7542" data-attributes="member: 8947"><p>Smoak, take heed of what Brent said. The change in MV due to temp change is more important then air density, humidity, and altitude.</p><p></p><p>I would suggest you develop your load using an insensitive powder like Hodgdon Extreme. These powders are also very accurate and clean burning. I develop my loads at various times of the year and the vel/drops are within the error of the day from 35C to -10C. This is a big confidence builder to know that you ammo works regardless of what the outside temp is.</p><p></p><p>The barrel is another story. Some do change POI when very cold. So the best advice I can give you is get there early. Let your gear equilibrate to the local temp/humidity. Shoot in the conditions you will hunt in to verify your sight in and drop.</p><p></p><p>You should sight your gun in anyways incase it moved during the trip. Shoot from a cold barrel to confirm LR drops and voila, you are good to go.</p><p></p><p>During this sight in and drop test, you may want to have your guide watch so that he understands that you know what you are doing at longer ranges. You don't need to have a debate about whether you can or can't hit your record animal when it steps out at distance.</p><p></p><p>Jerry</p></blockquote><p></p>
[QUOTE="Mysticplayer, post: 7542, member: 8947"] Smoak, take heed of what Brent said. The change in MV due to temp change is more important then air density, humidity, and altitude. I would suggest you develop your load using an insensitive powder like Hodgdon Extreme. These powders are also very accurate and clean burning. I develop my loads at various times of the year and the vel/drops are within the error of the day from 35C to -10C. This is a big confidence builder to know that you ammo works regardless of what the outside temp is. The barrel is another story. Some do change POI when very cold. So the best advice I can give you is get there early. Let your gear equilibrate to the local temp/humidity. Shoot in the conditions you will hunt in to verify your sight in and drop. You should sight your gun in anyways incase it moved during the trip. Shoot from a cold barrel to confirm LR drops and voila, you are good to go. During this sight in and drop test, you may want to have your guide watch so that he understands that you know what you are doing at longer ranges. You don't need to have a debate about whether you can or can't hit your record animal when it steps out at distance. Jerry [/QUOTE]
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