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Posted: 1/13/2012 8:05:11 AM EDT
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I know that some powders can be sensitive to the temps you load in as far as seasons go.
My question is: What if your loading area is the same temperature year round? Are temp sensitive ammo probs caused by loading in a garage with wild temp swings? I reload indoors and the room stays between 65 and 70 degrees all the time. |
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Quoted:
I know that some powders can be sensitive to the temps you load in as far as seasons go. My question is: What if your loading area is the same temperature year round? Are temp sensitive ammo probs caused by loading in a garage with wild temp swings? I reload indoors and the room stays between 65 and 70 degrees all the time. Say what??? All powders are sensitive to the temperature when they are fired, not loaded. Some are less sensitive, some are more. The temperature issue comes up when you take a load developed at one temperature and then fire it at another. Cold slows reactions, heat speeds them up. A load that is near max in 90F weather might be lower at 0F. A load near max at 0F is very likely to be over max at 90F. It is the temperature of the powder when burned that matters, not how hot or cold your loading room is. |
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Quoted:
Quoted:
I know that some powders can be sensitive to the temps you load in as far as seasons go. My question is: What if your loading area is the same temperature year round? Are temp sensitive ammo probs caused by loading in a garage with wild temp swings? I reload indoors and the room stays between 65 and 70 degrees all the time. Say what??? All powders are sensitive to the temperature when they are fired, not loaded. Some are less sensitive, some are more. The temperature issue comes up when you take a load developed at one temperature and then fire it at another. Cold slows reactions, heat speeds them up. A load that is near max in 90F weather might be lower at 0F. A load near max at 0F is very likely to be over max at 90F. It is the temperature of the powder when burned that matters, not how hot or cold your loading room is. Ok, thats what I was thinking. It was just bugging me for some reason. |
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Quoted:
I know that some powders can be sensitive to the temps you load in as far as seasons go. My question is: What if your loading area is the same temperature year round? Are temp sensitive ammo probs caused by loading in a garage with wild temp swings? I reload indoors and the room stays between 65 and 70 degrees all the time. imo....no. it doesnt make a diff what temp the powder is when you load it. as stated before.... its the over all atmospheric temp when its burned that you,ll see the difference,s. I live in southwest Texas and we,ve been having extreme low temps (for this area)...last yr was at 0 to 25 dg. and this yrs been floating right at 20dg nights and 50dg days, then summer hits and were at 100 plus, so Im quickly finding out what powders change more dramatically than others. For me, varget has proven itself time and time again thru seasonal changes and not as temp. sensitive. Even then, when its 105dg, and Im out shooting, I never-ever leave ammo in direct sun lite........Ive shoot out in the Phoenix Az area as well and holy cow.....its really hot there. |
Then again, I sure didn't make those rounds lol
| In all honesty I've kind of wondered the same thing too though. Being relatively new to the reloading arena, I'm very unsure as well. I load in my shed in the Texas hot ass summer, and now it's cold, so the extremes kind of bothered me loading. I dunno if that worries me more or just trying to take care of my equipment in the temp extremes etc. |
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Quoted:
In all honesty I've kind of wondered the same thing too though. Being relatively new to the reloading arena, I'm very unsure as well. I load in my shed in the Texas hot ass summer, and now it's cold, so the extremes kind of bothered me loading. I dunno if that worries me more or just trying to take care of my equipment in the temp extremes etc. Extreme heat could alter the moisture and solvent content of gunpowder if left uncovered for too long, but that would require days and maybe months of exposure to cause a significant change. I wouldn't worry about that. Cartridges that are chambered and fired at ambient condition really don't care about the temps during which they were loaded. Any dimensional changes due to coefficients of thermal expansion are microscopic over the relatively narrow range of temperatures we would work or shoot in. |
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