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Rifles, Reloading, Optics, Equipment
Reloading
Hidden Pressure Reading: A Method
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<blockquote data-quote="RockyMtnMT" data-source="post: 2875752" data-attributes="member: 7999"><p>I think primers are very difficult to read and the pressure indicator that I pay the least attention to. For the hand loader that doesn't have pressure testing equipment (most all of us) the pressure story is told by all of the indicators together. Not just one. Some rifles leave an ejector mark on all loads. This is why I start low in my load development. I want to see and feel the rifle at very mild loads and work up from there. Watching the velocity, bolt lift, case head, primer, and primer pocket. I think the best indicator is how the rifle feels as the pressure increases. When the bolt lift and ejection starts to feel different, the pressure is getting close to top end. Very well built custom rifles will hide the pressure felt on bolt lift. That rifle that shows ejector marks at mild loads will get to a point where the look of those marks becomes more pronounced. In other words when it starts to change its the point where you need to pay attention. As you work up watching your velocity increase nice and consistently with each increase in powder charge and you start seeing larger increases in speed with same increase in charge or more important a spike or larger jump in velocity, this is an indicator that you are starting to push pressure. But not if your velocity is low and all the other indicators show low pressure. If velocity is high and all the other indicators are saying top end that spike in velocity is likely a very good indicator that you are likely pushing the envelope.</p><p></p><p>So, my point is there are many things together that tell the pressure story. I pay most attention to how the rifle feels and the least to the primer. I pay attention to how all of these things change as I work up from mild. Starting too high deprives the shooter from feeling and seeing the changes.</p></blockquote><p></p>
[QUOTE="RockyMtnMT, post: 2875752, member: 7999"] I think primers are very difficult to read and the pressure indicator that I pay the least attention to. For the hand loader that doesn't have pressure testing equipment (most all of us) the pressure story is told by all of the indicators together. Not just one. Some rifles leave an ejector mark on all loads. This is why I start low in my load development. I want to see and feel the rifle at very mild loads and work up from there. Watching the velocity, bolt lift, case head, primer, and primer pocket. I think the best indicator is how the rifle feels as the pressure increases. When the bolt lift and ejection starts to feel different, the pressure is getting close to top end. Very well built custom rifles will hide the pressure felt on bolt lift. That rifle that shows ejector marks at mild loads will get to a point where the look of those marks becomes more pronounced. In other words when it starts to change its the point where you need to pay attention. As you work up watching your velocity increase nice and consistently with each increase in powder charge and you start seeing larger increases in speed with same increase in charge or more important a spike or larger jump in velocity, this is an indicator that you are starting to push pressure. But not if your velocity is low and all the other indicators show low pressure. If velocity is high and all the other indicators are saying top end that spike in velocity is likely a very good indicator that you are likely pushing the envelope. So, my point is there are many things together that tell the pressure story. I pay most attention to how the rifle feels and the least to the primer. I pay attention to how all of these things change as I work up from mild. Starting too high deprives the shooter from feeling and seeing the changes. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Hidden Pressure Reading: A Method
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