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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Sierra Gamechanger bullets.
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<blockquote data-quote="kiwikid" data-source="post: 1472560" data-attributes="member: 56094"><p>LDHunter in post #127 you made some interesting comments about Hornady claiming that the tips on their bullets were melting. This got me thinking about a news item I read years ago about the nose cone on the Concord reaching temps of 150°C (302° F) in the stagnation zone at a cruising speed of Mach 2 or 2050 fps. Looking into it further I found that the SR-71 Blackbird reached temps of around 480°C (890° F) at Mach 3.2 or close to 3300 fps. Now I have no idea at what temperature the polymer tip material the various bullet manufacturers use melts at but those temps are getting up there. Maybe one of the other more learned members can expand on this. </p><p>Kiwikid.</p></blockquote><p></p>
[QUOTE="kiwikid, post: 1472560, member: 56094"] LDHunter in post #127 you made some interesting comments about Hornady claiming that the tips on their bullets were melting. This got me thinking about a news item I read years ago about the nose cone on the Concord reaching temps of 150°C (302° F) in the stagnation zone at a cruising speed of Mach 2 or 2050 fps. Looking into it further I found that the SR-71 Blackbird reached temps of around 480°C (890° F) at Mach 3.2 or close to 3300 fps. Now I have no idea at what temperature the polymer tip material the various bullet manufacturers use melts at but those temps are getting up there. Maybe one of the other more learned members can expand on this. Kiwikid. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Sierra Gamechanger bullets.
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