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.284 win or 7mm-08 barrel life

 
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Old 08-04-2009, 11:02 PM
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Join Date: Oct 2007
Location: Patagonia Mountains, Arizona
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Re: .284 win or 7mm-08 barrel life

"Why would the 7-08 have a shorter life?"

In the 7mm08 approximately the same mass of powder is forced though a bore with 18% less area at about the same temperature as the 308. (1-(308/284)^2)*100 That produces higher surface temperature in the throat area resulting in shorter barrel life. The effect isn't linear. For a SWAG I'd say the 308 would give 25% more barrel life.
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