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Rifles, Reloading, Optics, Equipment
Reloading
Pressure changes with seating depth
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<blockquote data-quote="freddiej" data-source="post: 1752741" data-attributes="member: 26227"><p>I reckon since I am all out of popcorn I should do something with my brain and my fingers...</p><p>I have found that most everything I have read here is correct except for a few things. </p><p>jamming the ogive in the lead will bring up pressures exponentially. </p><p>the problem with the opposite, dropping the projo as far into the case, is that I have yet to find how far in you have to go to bring the pressures back up. I have two friends whom are engineers and they told me there has to be one point.. we have tried. I sunk my 45-70 slug almost all the way to inside the case and have not yet seen pressure signs with a 405 cast lead slug and H-4895. I chose a straightwall case for a few reasons.. faster burning powders, measurable reduction in combustion chamber, and to **** off the two engineers. I ran the projo all the way down to the powder charge and packed it like black powder, without any pressure signs. nearly did not get it out my 28" barrel as a result of this. the powder can not get a head start on building up pressure. the projo starts moving, increasing the volume of the combustion chamber, immediately after the primer is struck. </p><p>Just my two cents worth and my R/L experience trying to see how far is too far inside the case to bring back pressure.</p></blockquote><p></p>
[QUOTE="freddiej, post: 1752741, member: 26227"] I reckon since I am all out of popcorn I should do something with my brain and my fingers... I have found that most everything I have read here is correct except for a few things. jamming the ogive in the lead will bring up pressures exponentially. the problem with the opposite, dropping the projo as far into the case, is that I have yet to find how far in you have to go to bring the pressures back up. I have two friends whom are engineers and they told me there has to be one point.. we have tried. I sunk my 45-70 slug almost all the way to inside the case and have not yet seen pressure signs with a 405 cast lead slug and H-4895. I chose a straightwall case for a few reasons.. faster burning powders, measurable reduction in combustion chamber, and to **** off the two engineers. I ran the projo all the way down to the powder charge and packed it like black powder, without any pressure signs. nearly did not get it out my 28" barrel as a result of this. the powder can not get a head start on building up pressure. the projo starts moving, increasing the volume of the combustion chamber, immediately after the primer is struck. Just my two cents worth and my R/L experience trying to see how far is too far inside the case to bring back pressure. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Pressure changes with seating depth
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