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temp and altitude?

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Unread 05-07-2008, 08:15 PM
Bronze Member
Join Date: Nov 2007
Location: SW Michigan
Posts: 65
temp and altitude?

I live in south west Michigan where is flat. I am wondering hoe much temp and altitude effect poi. If I sight in my 300rum with a 200gr. accubond and retumbo powder and I dont plan on shooting at an animal past 7or 800 yds. I found a farmer who let me build a dirt mound and now I can shoot to 950yds. I am shooting twice a week 10 rds each day in the 300rum and 40-50 in the 17hmr. I am keeping 5" 10 shot group at 500yds and getting better. I know there is lots of room for improvement but Im still practcing.
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Unread 05-09-2008, 05:19 PM
Platinum Member
Join Date: Jul 2007
Location: Arkansas (Home of Record)
Posts: 1,467
Go to JBM's ballistic web page and punch in different numbers and see for yourself. Can make a hell of a difference when you go from one extreme to another, especially when you change both at the same time.
Courage is just fear that has said it's prayers.

The people trying to say the 2nd Amendment is outdated are probably the same folks that would say the same thing about the Bible.
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