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Long Range Hunting & Shooting
How does cold affect your barrel?
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<blockquote data-quote="Mysticplayer" data-source="post: 89261" data-attributes="member: 8947"><p>Changing weather can affect the stock and the action bedding. Why I prefer lam, synthetic or composite stocks. Also, I leave quite a large gap around the barrel and stock so any shift is not going to hit the barrel.</p><p></p><p>Most powders will 'lose' velocity as temp drops. This will affect trajectory but more importantly, barrel tuning as the load has effectively changed. Like using less powder in the summer.</p><p></p><p>To solve this, I shoot Hodgdon Extreme powders. These are very temp stable and shoot essentially the same from the summer to mild winter (I don't hunt when it gets really cold - season ends before that). There are a few other companies now making stable powders. Definitely do your research.</p><p></p><p>For primers, I use the CCI BR2 and Fed 210M for stand cases and the Fed 215M for magnum cases. They all seem to ignite very consistently in varying temperatures.</p><p></p><p>I do alot of shooting in the warmer months and test in early fall/winter just to make sure all is well. By using a stable stock and stable ammo, I have found almost no change in POI and drop tables.</p><p></p><p>You could of course work up a cold temp load and test/use only in the winter. That's more of a pain then I like. Plus are very real danger of using a cold load in the summer and locking things up.</p><p></p><p>I have only experienced once when the barrel itself changed POI due to extreme cold. This was definitely bitterly cold (around minus 10C and no fun to shoot in). After a few shots and the barrel went back to the 'normal' POI. The ammo worked well even with these cold temps.</p><p></p><p>Testing is the only way to know for sure...</p><p></p><p>Jerry</p></blockquote><p></p>
[QUOTE="Mysticplayer, post: 89261, member: 8947"] Changing weather can affect the stock and the action bedding. Why I prefer lam, synthetic or composite stocks. Also, I leave quite a large gap around the barrel and stock so any shift is not going to hit the barrel. Most powders will 'lose' velocity as temp drops. This will affect trajectory but more importantly, barrel tuning as the load has effectively changed. Like using less powder in the summer. To solve this, I shoot Hodgdon Extreme powders. These are very temp stable and shoot essentially the same from the summer to mild winter (I don't hunt when it gets really cold - season ends before that). There are a few other companies now making stable powders. Definitely do your research. For primers, I use the CCI BR2 and Fed 210M for stand cases and the Fed 215M for magnum cases. They all seem to ignite very consistently in varying temperatures. I do alot of shooting in the warmer months and test in early fall/winter just to make sure all is well. By using a stable stock and stable ammo, I have found almost no change in POI and drop tables. You could of course work up a cold temp load and test/use only in the winter. That's more of a pain then I like. Plus are very real danger of using a cold load in the summer and locking things up. I have only experienced once when the barrel itself changed POI due to extreme cold. This was definitely bitterly cold (around minus 10C and no fun to shoot in). After a few shots and the barrel went back to the 'normal' POI. The ammo worked well even with these cold temps. Testing is the only way to know for sure... Jerry [/QUOTE]
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How does cold affect your barrel?
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