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Rifles, Reloading, Optics, Equipment
Reloading
Cold temp caused faster speeds
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<blockquote data-quote="bstomper" data-source="post: 1777211" data-attributes="member: 37250"><p>About 2000 rounds on the 7rm with several times fired brass. I figured out the reason for the extra speed for the 7rm. I shortened the coal from 3.350" to 3.310" during my seating depth testing because it gave me the best groups and I never tested for speed after. So I assume The smaller case volume would give me more pressure and more speed. </p><p>But for the creedmoor I am still breaking in the barrel before I do load development. As I mentioned earlier I had loaded 30 rounds at 38gns with new brass and shot them then loaded from 38 up to 43 gns in .5 grain increments to find my max load for load development. Never seen any pressure signs at 43 gns. I thought 41 gns was safe to shoot so I Loaded up the last 50 brand new cases at 41 and went out to shoot. I cleaned my barrel of all copper before going out. Fired off 12 rounds just fine and thought I felt a sticky bolt on shot 13, 14, and 15. I stopped there. The sticky bolt seemed to get progressively worse from shot 12-15. I checked the barrel and it looks fine. I have no idea what happened. Why all of a sudden I am getting pressure signs.</p></blockquote><p></p>
[QUOTE="bstomper, post: 1777211, member: 37250"] About 2000 rounds on the 7rm with several times fired brass. I figured out the reason for the extra speed for the 7rm. I shortened the coal from 3.350” to 3.310” during my seating depth testing because it gave me the best groups and I never tested for speed after. So I assume The smaller case volume would give me more pressure and more speed. But for the creedmoor I am still breaking in the barrel before I do load development. As I mentioned earlier I had loaded 30 rounds at 38gns with new brass and shot them then loaded from 38 up to 43 gns in .5 grain increments to find my max load for load development. Never seen any pressure signs at 43 gns. I thought 41 gns was safe to shoot so I Loaded up the last 50 brand new cases at 41 and went out to shoot. I cleaned my barrel of all copper before going out. Fired off 12 rounds just fine and thought I felt a sticky bolt on shot 13, 14, and 15. I stopped there. The sticky bolt seemed to get progressively worse from shot 12-15. I checked the barrel and it looks fine. I have no idea what happened. Why all of a sudden I am getting pressure signs. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Cold temp caused faster speeds
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