(sic)[/quote]
What you can use is barrel length to increase the accurate life of a barrel. A .308 with a 26" barrel is going to have a significantly longer barrel life than a 300 win mag cut to whatever length matches the velocity. You have less dwell time in the barrel in the 300 win mag, but a barrel will last way longer with a nominal 45 gr powder charge in the the .308 than a nominal 70 gr charge in the win mag.
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Not sure I am following this correctly. Are you saying to use a longer barrel to increase velocity instead of more powder? If this then yes but it sounds like you are saying longer barrels last longer?
"When you disarm the people, you commence to offend them and show that you distrust them either through cowardice or lack of confidence, and both of these opinions generate hatred." Niccolo Machiavelli
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