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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Anyone own a 7mm 300 Win Mag?
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<blockquote data-quote="FURMAN" data-source="post: 1487724" data-attributes="member: 26535"><p>You are over simplifying it. If your thought process were true then the friction from extra barrel length would actually slow the bullet down. Your statement is to some extent true but just not that simple. Obviously there is a point at which the barrel length is causing more harm than good. The only way to truly know is actually chop your barrel and measure as you go. I have seen countless times where the same charge in one barrel is faster in another of the same length. Over hundreds of thousands of rounds from different people and different rifles the rule of thumb is about 25-50 fps per inch. Obviously different cartridges respond differently and different powder burn rates have an effect. Bearing surface of the bullet has en effect. One of the many examples I personally can give is my 28" 300WM was about 50fps faster than my 27" with the same load.</p></blockquote><p></p>
[QUOTE="FURMAN, post: 1487724, member: 26535"] You are over simplifying it. If your thought process were true then the friction from extra barrel length would actually slow the bullet down. Your statement is to some extent true but just not that simple. Obviously there is a point at which the barrel length is causing more harm than good. The only way to truly know is actually chop your barrel and measure as you go. I have seen countless times where the same charge in one barrel is faster in another of the same length. Over hundreds of thousands of rounds from different people and different rifles the rule of thumb is about 25-50 fps per inch. Obviously different cartridges respond differently and different powder burn rates have an effect. Bearing surface of the bullet has en effect. One of the many examples I personally can give is my 28" 300WM was about 50fps faster than my 27" with the same load. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Anyone own a 7mm 300 Win Mag?
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