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MV and Temp

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Unread 12-22-2005, 01:47 PM
Silver Member
Join Date: Jun 2003
Location: Aussie in Italy
Posts: 433
MV and Temp

Just a quick question;

I chronoed a 6PPC load today at around;
5C, 300meters above sea level, 2 feet from Chrono and got a mean velocity of 3011fps & 3057fps for Lapua and Sako brass using the same load respectively. Forgot to check air pressure.

25.3gn VV N130
70gn Nosler Ballistic tip.

When I take that ammo back to Australia (leave tomorrow) and shoot it at around 100meters(300ft) in much hotter temperatures from 28C to 40C(100F?) how much of an increase in MV should I expect? I have run it through an online ballistics calculator but that can only tell me how a bullet will behave in different conditions with the same MV.

Should the MV not raise also as I go into the desert? By how much?
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