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Long Range Hunting & Shooting
Elevation effects on bullet trajectory
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<blockquote data-quote="LRNut" data-source="post: 2132327" data-attributes="member: 3230"><p>I reread your post; you said your MV dropped 150 fps; that is really significant. I once tested spherical powders in hot/cold and got over 100 fps difference, but the temp was pretty drastic. Are you using spherical powders?</p><p></p><p>The point I was making is that IF you mv doesn't change, it takes a really big change in temp to have any meaningful impact on trajectory.</p><p></p><p>Maybe you did something dumb like load some rounds with less powder; a few months ago one of my 28 Noslers suddenly went from 3000 to 3250 - and definitely overpressure. I pulled a bullet when I got home and much to my chagrin, I found I charged 87.5 instead of 78.5 gr of RL33. Did the same thing when I sold a car last month: advertised a 2013 Corolla for 4300 - got hammered on CL. Took the first buyer and called him - I told him the price was firm at $3400. When I went to delete my ad, I saw I had it at priced to go for $4300...gulp. He got a hell of a deal.</p></blockquote><p></p>
[QUOTE="LRNut, post: 2132327, member: 3230"] I reread your post; you said your MV dropped 150 fps; that is really significant. I once tested spherical powders in hot/cold and got over 100 fps difference, but the temp was pretty drastic. Are you using spherical powders? The point I was making is that IF you mv doesn't change, it takes a really big change in temp to have any meaningful impact on trajectory. Maybe you did something dumb like load some rounds with less powder; a few months ago one of my 28 Noslers suddenly went from 3000 to 3250 - and definitely overpressure. I pulled a bullet when I got home and much to my chagrin, I found I charged 87.5 instead of 78.5 gr of RL33. Did the same thing when I sold a car last month: advertised a 2013 Corolla for 4300 - got hammered on CL. Took the first buyer and called him - I told him the price was firm at $3400. When I went to delete my ad, I saw I had it at priced to go for $4300...gulp. He got a hell of a deal. [/QUOTE]
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