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Rifles, Reloading, Optics, Equipment
Reloading
280 ai speed
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<blockquote data-quote="varmintH8R" data-source="post: 992557" data-attributes="member: 39801"><p>I finally had a chance to shoot them today. Nice day for it, partly cloudy and 75F. All data is from a Magnetospeed V2. I was shooting from a bench at 150yds. </p><p></p><p>Retumbo - no pressure signs at max load, but no physical case room to go higher anyway. Velocity was about 50-60fps faster than H4831 max in my rifle. My three highest charge weights shot into slightly verticle, touching line. I am going to load some more at 62.5 and see what type of accuracy I get. There was a major jump in velocity in the middle of the work up (61.0 to 61.5), and it was a clear separator between POI (below that level groups were together and low, above it they were together and about 3/4" higher). I won't read too much into one set of data points but the obvious split in readings AND POI at that point was interesting. </p><p></p><p></p><p>IMR 7828 - no pressure signs at book max, and I have room in the case to go higher if I was so inclined. I probably won't, as velocities were higher than H4831SC but not so much that I would make the switch. The lower charge weights also seemed to be printing tighter groups than the higher weights.</p></blockquote><p></p>
[QUOTE="varmintH8R, post: 992557, member: 39801"] I finally had a chance to shoot them today. Nice day for it, partly cloudy and 75F. All data is from a Magnetospeed V2. I was shooting from a bench at 150yds. Retumbo - no pressure signs at max load, but no physical case room to go higher anyway. Velocity was about 50-60fps faster than H4831 max in my rifle. My three highest charge weights shot into slightly verticle, touching line. I am going to load some more at 62.5 and see what type of accuracy I get. There was a major jump in velocity in the middle of the work up (61.0 to 61.5), and it was a clear separator between POI (below that level groups were together and low, above it they were together and about 3/4" higher). I won't read too much into one set of data points but the obvious split in readings AND POI at that point was interesting. IMR 7828 - no pressure signs at book max, and I have room in the case to go higher if I was so inclined. I probably won't, as velocities were higher than H4831SC but not so much that I would make the switch. The lower charge weights also seemed to be printing tighter groups than the higher weights. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
280 ai speed
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