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Rifles, Reloading, Optics, Equipment
Reloading
131 Hammer Hunter 7mm-08
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<blockquote data-quote="PddPdd" data-source="post: 2376348" data-attributes="member: 111799"><p>My experience has been the more I up the velocity with the Hammers, the tighter the groups.</p><p></p><p>I noted that you had one sticky bolt lift out of five shots. In my experience, if I'm not careful to only move the shoulder (headspace) the minimum amount to get smooth bolt closure, then I will get an excessive brass expansion on the next firing of that particular case with a repeating sticky bolt lift. The reason being is that the case was permanently deformed upon firing, as opposed to being elastically (temporarily) deformed to fit the chamber, and it didn't elastically contract for a smooth extraction because the volume of expansion was more than the case could do without permanently deforming.</p><p></p><p>Let me know if I failed to communicate clearly.</p><p></p><p>Bottom line: Excessive headspace correction can lead to repeat sticky bolt lifts before you are really hitting a pressure limit.</p><p></p><p>This is my experience only. Only load to the levels that YOU are comfortable with.</p></blockquote><p></p>
[QUOTE="PddPdd, post: 2376348, member: 111799"] My experience has been the more I up the velocity with the Hammers, the tighter the groups. I noted that you had one sticky bolt lift out of five shots. In my experience, if I'm not careful to only move the shoulder (headspace) the minimum amount to get smooth bolt closure, then I will get an excessive brass expansion on the next firing of that particular case with a repeating sticky bolt lift. The reason being is that the case was permanently deformed upon firing, as opposed to being elastically (temporarily) deformed to fit the chamber, and it didn't elastically contract for a smooth extraction because the volume of expansion was more than the case could do without permanently deforming. Let me know if I failed to communicate clearly. Bottom line: Excessive headspace correction can lead to repeat sticky bolt lifts before you are really hitting a pressure limit. This is my experience only. Only load to the levels that YOU are comfortable with. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
131 Hammer Hunter 7mm-08
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