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July 11, 2009
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I was shooting some of my 445sm loads yesterday and was reminded of something very important. Temperature sensitivity (I was using W296 in this case)
Fired a dozen, all was fine. Took a short break then fired off the next 6. EXTREMELY difficult ejection and the flattest primers I've ever seen.
I realized I had left my ammo in the sun, so it heated up very quickly.
Excess pressure due to temp doesn't just happen when it's hot. Work up a load in cold weather and you may be fine. Shoot the same load when it warms up a little, you could be putting yourself in a bad spot.
DW's are strong, but everything can fail. Some powders are more sensitive than others, but it's never a good idea to leave your ammo in the sun. Reduce your "cold weather" loads when it warms up and work them up from there.
Hope is not a course of action
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Dans Club
February 28, 2009
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Great reminder. We all forget things from time to time, especially when it's familiar stuff. Glad there were no catastrophes.
-Mike
January 22, 2008
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This is good information! As a relative newbie to reloading I had never thought of this, thanks for sharing!
Dans Club
March 2, 2008
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Jody said
This is good information! As a relative newbie to reloading I had never thought of this, thanks for sharing!
I would never have considered the possibility of something like this.
One more reason that I surround myself with people smarter that me
And "people smarter than me" is pretty much ALL OF YOU!
I went to a bookstore and asked the saleswoman "Were is the Self Help Section?" She said if she told me, it would defeat the purpose.
George Carlin
July 9, 2013
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I started reloading in 1991 and I've still have never given a thought to this. You are never too old to learn something new. Thank you for sharing this great piece of info.
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Dans Club
December 4, 2011
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Boyle's Law (I think) says that pressure will vary directly with temperature. So the hotter it gets, the higher the pressures.
Anything worth doing is worth doing well.
My father
If a man designed it, and a man built it, then a man can fix it.
My grandfather
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