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Rifles, Reloading, Optics, Equipment
Reloading
220 swift imr 4064 low fps
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<blockquote data-quote="1984nitro" data-source="post: 437623" data-attributes="member: 24113"><p>So the other day I went out and reworked some loads for my 220 swift. I end up with this load</p><p>55gn vmax</p><p>remington brass</p><p>cci 250m primer</p><p>38.0gn 4064</p><p>fps: 3640</p><p>ES: 43fps (not worried here because very little case prep)</p><p>Group: .23"</p><p>temp was 50degrees</p><p>So my question is isn't this velocity low? According to hodgdon data book 37.5gn gets you 3742. Also do I need to worry about pressure signs come rock chuck season this summer due to the change in temp?</p><p>The rifle specs ruger m77 Mark II 24" barrel and 1/14"</p><p>Thanks</p><p>Eric</p></blockquote><p></p>
[QUOTE="1984nitro, post: 437623, member: 24113"] So the other day I went out and reworked some loads for my 220 swift. I end up with this load 55gn vmax remington brass cci 250m primer 38.0gn 4064 fps: 3640 ES: 43fps (not worried here because very little case prep) Group: .23" temp was 50degrees So my question is isn't this velocity low? According to hodgdon data book 37.5gn gets you 3742. Also do I need to worry about pressure signs come rock chuck season this summer due to the change in temp? The rifle specs ruger m77 Mark II 24" barrel and 1/14" Thanks Eric [/QUOTE]
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Reloading
220 swift imr 4064 low fps
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