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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Hodgdon's "Extreme Powder" - reduce velocity variations due to temperature changes
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<blockquote data-quote="Code4" data-source="post: 431541" data-attributes="member: 26988"><p><strong>Re: Hodgdon's "Extreme Powder" - reduce velocity variations due to temperature chan</strong></p><p></p><p>At a recent field course held by <a href="http://www.longrangehunting.com.au" target="_blank">www.longrangehunting.com.au</a> here in Oz, it was revealed that 2209 (sold in the US as H4350) loaded into a .303B gave a 1.514fps velocity increase for every degree increase in temperature from 0.c (freezing) to 35.c (95 Fahrenheit).</p><p> </p><p>Norma Factory Ammo ( Vihtavouri ?? ) gave appox 3.5fps increase per degree of temperature increase.</p><p> </p><p>Ammunition was fired over a chronograph and was held at freezing and a second lot warmed to 35 deg C. I beleive this helps the long range shooter determine the actual burning rate of the powder in his load, in his rifle.</p></blockquote><p></p>
[QUOTE="Code4, post: 431541, member: 26988"] [b]Re: Hodgdon's "Extreme Powder" - reduce velocity variations due to temperature chan[/b] At a recent field course held by [URL="http://www.longrangehunting.com.au"]www.longrangehunting.com.au[/URL] here in Oz, it was revealed that 2209 (sold in the US as H4350) loaded into a .303B gave a 1.514fps velocity increase for every degree increase in temperature from 0.c (freezing) to 35.c (95 Fahrenheit). Norma Factory Ammo ( Vihtavouri ?? ) gave appox 3.5fps increase per degree of temperature increase. Ammunition was fired over a chronograph and was held at freezing and a second lot warmed to 35 deg C. I beleive this helps the long range shooter determine the actual burning rate of the powder in his load, in his rifle. [/QUOTE]
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Hodgdon's "Extreme Powder" - reduce velocity variations due to temperature changes
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