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Rifles, Reloading, Optics, Equipment
Reloading
Brass troubles
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<blockquote data-quote="MagnumManiac" data-source="post: 243101" data-attributes="member: 10755"><p>My question is: How do you know that the barnes is producing less pressure at the same powder charge?</p><p>My experience has shown that to achieve the same velocity as conventional bullets with the Barnes you need to overload by 5%-10%, above SAAMI max pressure, using my pressure sensor I have found that Nosler Accubonds and Ballistic Tips give higher velocities at lower pressure than nearly all other bullets, including the Barnes.</p><p> </p><p>Your examples don't prove whether the Barnes is showing less pressure or more pressure compared to the Accubond, only velocity differences, it is quite common for any type of bullet to show velocity differences compared to another with the same powder charge, that is why we 'work' up our loads, but pressure differences are an entirely different matter, we cannot compare pressure with velocity, some bullets are faster or slower at the same pressure, which should not be confused with the same powder charge.</p><p> </p><p>Powder burning rates can change depending on the bullet used, even in the same case, which in turn raises/lowers pressure and therefore changes the burning rate even more, which is the cause of the original thread. The powder used with one bullet showed 'normal' operation, and when used with another showed too little pressure for normal operation.</p><p> </p><p>You can never take anything for granted when it comes to handloading, the variables are exponentionally mind numbing.</p><p>Cheers.</p><p>MagnumManiac.</p><p>gun)</p></blockquote><p></p>
[QUOTE="MagnumManiac, post: 243101, member: 10755"] My question is: How do you know that the barnes is producing less pressure at the same powder charge? My experience has shown that to achieve the same velocity as conventional bullets with the Barnes you need to overload by 5%-10%, above SAAMI max pressure, using my pressure sensor I have found that Nosler Accubonds and Ballistic Tips give higher velocities at lower pressure than nearly all other bullets, including the Barnes. Your examples don't prove whether the Barnes is showing less pressure or more pressure compared to the Accubond, only velocity differences, it is quite common for any type of bullet to show velocity differences compared to another with the same powder charge, that is why we 'work' up our loads, but pressure differences are an entirely different matter, we cannot compare pressure with velocity, some bullets are faster or slower at the same pressure, which should not be confused with the same powder charge. Powder burning rates can change depending on the bullet used, even in the same case, which in turn raises/lowers pressure and therefore changes the burning rate even more, which is the cause of the original thread. The powder used with one bullet showed 'normal' operation, and when used with another showed too little pressure for normal operation. You can never take anything for granted when it comes to handloading, the variables are exponentionally mind numbing. Cheers. MagnumManiac. gun) [/QUOTE]
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