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<blockquote data-quote="brianwinzor" data-source="post: 125460" data-attributes="member: 1067"><p>Greg, I try and assess powder burning rate on the weight of powder burned at what I consider maximum pressure. </p><p></p><p>I would certainly like to own a model 43 chronograph and strain guage to make decision making more black or white. However, after 40 years of reloading I do believe I have become adept at estimating the pressure signs.</p><p></p><p>I admit that so far I have only tested the 2 powders side by side in my 257W with the 156 grain bullet, and further testing with different bullet weights, and in different cases may reverse the earlier result. </p><p></p><p>I have also found that H870 produces more velocity than H50BMG for equal amounts of powder, but like many other ball powders the apparent maximum pressure has shifted constantly depending on temperature at the time. </p><p></p><p>The maximum load of H50BMG has so far consistently produced maximum pressure with the same load irrespective of temperature, and has also produced remarkably consistent velocities with extreme spreads being always under 20fps.</p><p></p><p>I will be interested to hear how your 7mm Fatso goes with the 200 grain Wildcats once the 8 twist barrel arrives. Brian.</p></blockquote><p></p>
[QUOTE="brianwinzor, post: 125460, member: 1067"] Greg, I try and assess powder burning rate on the weight of powder burned at what I consider maximum pressure. I would certainly like to own a model 43 chronograph and strain guage to make decision making more black or white. However, after 40 years of reloading I do believe I have become adept at estimating the pressure signs. I admit that so far I have only tested the 2 powders side by side in my 257W with the 156 grain bullet, and further testing with different bullet weights, and in different cases may reverse the earlier result. I have also found that H870 produces more velocity than H50BMG for equal amounts of powder, but like many other ball powders the apparent maximum pressure has shifted constantly depending on temperature at the time. The maximum load of H50BMG has so far consistently produced maximum pressure with the same load irrespective of temperature, and has also produced remarkably consistent velocities with extreme spreads being always under 20fps. I will be interested to hear how your 7mm Fatso goes with the 200 grain Wildcats once the 8 twist barrel arrives. Brian. [/QUOTE]
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