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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
tempature and point of impact and powder?
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<blockquote data-quote="Mysticplayer" data-source="post: 36338" data-attributes="member: 8947"><p>Changes in temp will affect your shooting two ways: your powder and load pressure, and your barrel.</p><p></p><p>I use the Hodgdon Extreme line of powders and have not experieced any measurable difference in my drop table from the summer (up to 35C or 100F) down to fall hunting which can hover above freezing.</p><p></p><p>If you use any other powder, you could see up to 200fps difference over that temp change. That not only changes your POI (each rifle will be different) but your accuracy may go for a dump too.</p><p></p><p>The second way is how your barrel changes in the cold. Usually, there is little affect when temps are above freezing, however, when temps plummet, steel can change.</p><p></p><p>The only way to know is to shoot in the low temps. My otherwise superbly stable '06 shot low when subjected to -15C temps. That would have affected any LR doping. After a few shots, the POI returned to 'zero'.</p><p></p><p>Every load and rifle should be tested as much as possible under the conditions you will be hunting in. Failing that, the first shot sighter tech will help.</p><p></p><p>Jerry</p></blockquote><p></p>
[QUOTE="Mysticplayer, post: 36338, member: 8947"] Changes in temp will affect your shooting two ways: your powder and load pressure, and your barrel. I use the Hodgdon Extreme line of powders and have not experieced any measurable difference in my drop table from the summer (up to 35C or 100F) down to fall hunting which can hover above freezing. If you use any other powder, you could see up to 200fps difference over that temp change. That not only changes your POI (each rifle will be different) but your accuracy may go for a dump too. The second way is how your barrel changes in the cold. Usually, there is little affect when temps are above freezing, however, when temps plummet, steel can change. The only way to know is to shoot in the low temps. My otherwise superbly stable '06 shot low when subjected to -15C temps. That would have affected any LR doping. After a few shots, the POI returned to 'zero'. Every load and rifle should be tested as much as possible under the conditions you will be hunting in. Failing that, the first shot sighter tech will help. Jerry [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
tempature and point of impact and powder?
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