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Rifles, Reloading, Optics, Equipment
Reloading
Pressure changes with seating depth
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<blockquote data-quote="Quicksilver338" data-source="post: 1751959" data-attributes="member: 108268"><p>Little background I guess on the setup. Ryan pierce built 300 norma mag improved. The Lapua brass is essentially indestructible and primer flattening and bolt lift are the easiest ways or only ways you're going to see pressure. You do see some marks in the bolt face once you start running up there but you see slight marks at lower pressures too so not a for sure way to detect pressure. </p><p></p><p>I'm running n570 powder and starting load development with the 199gr hammer hunter. Barrel is a 1:9 proof. I am currently loaded .010" off the lands since I believe being up closer shows pressure signs sooner than a large jump. I have yet to do testing beyond the initial ladder test but using a magnetospeed I found a wide node but just beyond that seemed to be getting pressure signs like bolt click, heavier lift, etc. It seems like most people running this bullet are jumping them quite a ways, which doesn't say mine won't shoot at .010" off but if I did have to seat them deeper to say .050" to get them to tighten up the groups the would it spike my pressure out of that node. Being a norma improved and along with the hammer bullet there is really no load data out there and am flying blind. </p><p></p><p>Checking here to see if I can get any insight before I further test things.</p></blockquote><p></p>
[QUOTE="Quicksilver338, post: 1751959, member: 108268"] Little background I guess on the setup. Ryan pierce built 300 norma mag improved. The Lapua brass is essentially indestructible and primer flattening and bolt lift are the easiest ways or only ways you’re going to see pressure. You do see some marks in the bolt face once you start running up there but you see slight marks at lower pressures too so not a for sure way to detect pressure. I’m running n570 powder and starting load development with the 199gr hammer hunter. Barrel is a 1:9 proof. I am currently loaded .010” off the lands since I believe being up closer shows pressure signs sooner than a large jump. I have yet to do testing beyond the initial ladder test but using a magnetospeed I found a wide node but just beyond that seemed to be getting pressure signs like bolt click, heavier lift, etc. It seems like most people running this bullet are jumping them quite a ways, which doesn’t say mine won’t shoot at .010” off but if I did have to seat them deeper to say .050” to get them to tighten up the groups the would it spike my pressure out of that node. Being a norma improved and along with the hammer bullet there is really no load data out there and am flying blind. Checking here to see if I can get any insight before I further test things. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Pressure changes with seating depth
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