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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Question on Sierra TMK and TGK vs SMK
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<blockquote data-quote="Doom2" data-source="post: 2296984" data-attributes="member: 108323"><p>The 168 is unstable in the trans sonic region (less than 1.2 Mach) due to it steep boattail angle. Typically some where around 800 yds it tumbles in a 308. The 175 doesn't suffer the same issue. The 169 is a closed tip design and tangent ogive. The claimed BC is significantly higher than the 175 IF you need it. Should be easy to tune.</p><p></p><p>I haven't tried it. My shooting is 600yds or less so the 168 is my normal 308 bullet.</p></blockquote><p></p>
[QUOTE="Doom2, post: 2296984, member: 108323"] The 168 is unstable in the trans sonic region (less than 1.2 Mach) due to it steep boattail angle. Typically some where around 800 yds it tumbles in a 308. The 175 doesn’t suffer the same issue. The 169 is a closed tip design and tangent ogive. The claimed BC is significantly higher than the 175 IF you need it. Should be easy to tune. I haven’t tried it. My shooting is 600yds or less so the 168 is my normal 308 bullet. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Question on Sierra TMK and TGK vs SMK
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