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Long Range Hunting & Shooting
How does cold affect your barrel?
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<blockquote data-quote="Michael Eichele" data-source="post: 89322" data-attributes="member: 1007"><p>I do a great deal of shooting in both 60-80 degree air as well as sub zero air close to sea level. If my ammo is kept in a warm truck around 70 degrees I dont notice a zero or accuracy change out to 300 yards. 400-600 is small and after 600 yards its time to really compensate for the thick air. I only use McMillan stocks to minimize the cold air's effect on my rifle. I am VERY lucky to have a 308 that will not throw bullet #1 out of the group due to the "cold bore" shot. Even if the barrel has been in -10 degrees for quite some time. This is of course if I am using warm ammo. If your ammo is going to get that cold, its best to develop a load for your hunt in those conditions. Personaly I tend to keep ammo in my pocket and load the rifle when I am setting up for the shot.</p><p></p><p>Some key points to think about in cold air shooting:</p><p></p><p>Use a GOOD synthetic stock free floated.</p><p></p><p>Keep the barrel to 26" or less. including brakes.</p><p></p><p>Keep your ammo warm or develop for the enviornment and/or use only EXTREEM powders or learn in detail what happens to you velocity at various temps, then compensate for your POI and trajectory accordingly.</p><p></p><p>If your rifle has a cold bore issue, concider a warm up shot followed by the killing shot. You will not need to use this practice up to 300 yards unless you have a real turd of a rifle.</p></blockquote><p></p>
[QUOTE="Michael Eichele, post: 89322, member: 1007"] I do a great deal of shooting in both 60-80 degree air as well as sub zero air close to sea level. If my ammo is kept in a warm truck around 70 degrees I dont notice a zero or accuracy change out to 300 yards. 400-600 is small and after 600 yards its time to really compensate for the thick air. I only use McMillan stocks to minimize the cold air's effect on my rifle. I am VERY lucky to have a 308 that will not throw bullet #1 out of the group due to the "cold bore" shot. Even if the barrel has been in -10 degrees for quite some time. This is of course if I am using warm ammo. If your ammo is going to get that cold, its best to develop a load for your hunt in those conditions. Personaly I tend to keep ammo in my pocket and load the rifle when I am setting up for the shot. Some key points to think about in cold air shooting: Use a GOOD synthetic stock free floated. Keep the barrel to 26" or less. including brakes. Keep your ammo warm or develop for the enviornment and/or use only EXTREEM powders or learn in detail what happens to you velocity at various temps, then compensate for your POI and trajectory accordingly. If your rifle has a cold bore issue, concider a warm up shot followed by the killing shot. You will not need to use this practice up to 300 yards unless you have a real turd of a rifle. [/QUOTE]
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How does cold affect your barrel?
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