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Hunting
Long Range Hunting & Shooting
Help with 137gr 6.5mm Hammer bullets
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<blockquote data-quote="Defiance7mm" data-source="post: 1731595" data-attributes="member: 101095"><p>So Im running the 137 gr 6.5mm in a 6.5 SAUM. Rifle is a Curtis Vector short action with a 26 in. Proof carbon 7.5 twist with a .140 freebore. Im seating the 137's at max mag length, 2.885. Running Norma brass with CCI BR2 and 62 gr of Retumbo. My magnetospeed is giving me a average velocity of 3150. So my question is what BC are you guys running for these bullets? Hammer says .280 G7 estimated. With the drop data I have to 1000 yards I have to bump my velocity up to 3215 to get things to line up. I use the Shooter app and played with the BC in my calculator with my velocity of 3150 and bumped the BC up to .310 and it seems to line up with my drop data. I also forgot I live in Colorado at 6000 feet. </p><p></p><p>Anyone running these bullets and if so what BC are you using to get your data to line up? Thanks for any input</p></blockquote><p></p>
[QUOTE="Defiance7mm, post: 1731595, member: 101095"] So Im running the 137 gr 6.5mm in a 6.5 SAUM. Rifle is a Curtis Vector short action with a 26 in. Proof carbon 7.5 twist with a .140 freebore. Im seating the 137's at max mag length, 2.885. Running Norma brass with CCI BR2 and 62 gr of Retumbo. My magnetospeed is giving me a average velocity of 3150. So my question is what BC are you guys running for these bullets? Hammer says .280 G7 estimated. With the drop data I have to 1000 yards I have to bump my velocity up to 3215 to get things to line up. I use the Shooter app and played with the BC in my calculator with my velocity of 3150 and bumped the BC up to .310 and it seems to line up with my drop data. I also forgot I live in Colorado at 6000 feet. Anyone running these bullets and if so what BC are you using to get your data to line up? Thanks for any input [/QUOTE]
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Help with 137gr 6.5mm Hammer bullets
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