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Rifles, Reloading, Optics, Equipment
Reloading
Need help with 300 wsm please!
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<blockquote data-quote="freelunch" data-source="post: 329904" data-attributes="member: 14655"><p>Scout1 concerning OBT method,</p><p></p><p> For those who do not know, OBT is optimal barrel time and is a theory that the accuracy nodes for any caliber, bullet and powder is dependent on specific barrel time nodes (pressure waves). People use Quickload to determine the exact powder load to equal the pre-calculated OBT node times.</p><p></p><p> The tables for OBT Scout1, are in 1/2" barrel length increments, and the time adjustment for each increment merely adjusts it so all barrel lengths will give the same OBT node. So in this case I just chose a barrel length of 24". I could have used 26 or 20" and it would have resulted in the same OBT node results.</p><p></p><p> I had an ulterior motive in calculating the OBT nodes for volunteerbee. This was a double-blind statistical test of OBT where volunteerbee probably didn't know about OBT and I didn't know the accuracy nodes beforehand for 300WSM. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p></p><p> Yeah, I was "using" volunteerbee as a test subject for my own purposes in proving or disproving the OBT method. But, but, if the OBT method calculates good accuracy nodes then volunteerbee gets them for use rather than using the max load for RL-17 from the Alliant website as he did (69.3gr), which wasn't on an accuracy node. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin :D" loading="lazy" data-shortname=":D" /></p></blockquote><p></p>
[QUOTE="freelunch, post: 329904, member: 14655"] Scout1 concerning OBT method, For those who do not know, OBT is optimal barrel time and is a theory that the accuracy nodes for any caliber, bullet and powder is dependent on specific barrel time nodes (pressure waves). People use Quickload to determine the exact powder load to equal the pre-calculated OBT node times. The tables for OBT Scout1, are in 1/2" barrel length increments, and the time adjustment for each increment merely adjusts it so all barrel lengths will give the same OBT node. So in this case I just chose a barrel length of 24". I could have used 26 or 20" and it would have resulted in the same OBT node results. I had an ulterior motive in calculating the OBT nodes for volunteerbee. This was a double-blind statistical test of OBT where volunteerbee probably didn't know about OBT and I didn't know the accuracy nodes beforehand for 300WSM. :) Yeah, I was "using" volunteerbee as a test subject for my own purposes in proving or disproving the OBT method. But, but, if the OBT method calculates good accuracy nodes then volunteerbee gets them for use rather than using the max load for RL-17 from the Alliant website as he did (69.3gr), which wasn't on an accuracy node. :D [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Need help with 300 wsm please!
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