Temperature Effects on Powder

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Temperature Effects on Powder

Post by messenger on Sun Oct 28, 2018 3:06 pm

While the subject of powders is on the table and now that winter is coming upon us, What powders are most affected by cold? I know that Vihtavuori is but what else? 

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Re: Temperature Effects on Powder

Post by Chris Miceli on Sun Oct 28, 2018 3:25 pm

I shot the same charge of n310 and bullseye in 70 degrees as well as 0 degree. It ran sluggishly but functioned mostly the same.


Last edited by Chris Miceli on Sun Oct 28, 2018 3:33 pm; edited 1 time in total
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Re: Temperature Effects on Powder

Post by james r chapman on Sun Oct 28, 2018 3:30 pm

(snicker)
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Re: Temperature Effects on Powder

Post by LenV on Sun Oct 28, 2018 5:59 pm

I don't have any powder that works below 40. Well, unless I am elk hunting.. Laughing
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Re: Temperature Effects on Powder

Post by Jon Eulette on Sun Oct 28, 2018 7:06 pm

I run 3.4 gr BE majority of the year/time. In Phoenix when shooting mid-winters got down to low 40’s. Wouldn’t lock back the slide on last shot and ejected rds stayed on shooting bench. Ran 3.5 better.
Jon


Last edited by Jon Eulette on Sun Oct 28, 2018 8:01 pm; edited 1 time in total
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Re: Temperature Effects on Powder

Post by Blsi2600 on Sun Oct 28, 2018 7:34 pm

Up the charge 2 or 3 tenths and run a thin lube.

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Re: Temperature Effects on Powder

Post by jglenn21 on Mon Oct 29, 2018 8:37 am

If your'e into the details of temperature affects, google Denton Bramwell. He wrote many interesting articles for the long gone Varmit Hunter magazine on that subject..


Last edited by jglenn21 on Mon Oct 29, 2018 11:33 am; edited 1 time in total
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Re: Temperature Effects on Powder

Post by Wobbley on Mon Oct 29, 2018 10:35 am

Here is the velocity and pressure variance allowable for M882 9mm Ball ammo from the military specification.  Since our powder and primers are similar we should expect similar results as a percentage since we don’t run the same pressures.  One caveat is that powders with heavy deterrent coatings have been problematic in RIFLE applications when using small primers in 308 sized cartridges in cold weather.  The only powders like that in Pistol are SOME ball powders.  
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