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Rifles, Reloading, Optics, Equipment
Reloading
Help needed please ( 7mm Rem Mag ).
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<blockquote data-quote="USCGLongBow" data-source="post: 961872" data-attributes="member: 81191"><p>A few things come to mind, one how small is the contour? As Mud said you could have affected the accuracy by turning it, especially if one side of the barrel is even slightly thicker than the other. Two, it doesn't seem like much but the 2" you took off the end will effect where and how the bullet leaves the barrel in relation to the twist, so you might need slightly different bullets than what you used before. And the third and most important thing I have, goes back to the barrel contour. How long between shots with the new barrel? A bull barrel dissipates the heat over more metal meaning the barrel heats more slowly, a hunting contour is more likely to heat immediately and need more time to cool between shots to remain accurate. I have a 270 with a very light contour that groups in the same hole every time, BUT I have to wait 30 minutes between shots to be accurate, and longer if the temp is above 80.</p></blockquote><p></p>
[QUOTE="USCGLongBow, post: 961872, member: 81191"] A few things come to mind, one how small is the contour? As Mud said you could have affected the accuracy by turning it, especially if one side of the barrel is even slightly thicker than the other. Two, it doesn't seem like much but the 2" you took off the end will effect where and how the bullet leaves the barrel in relation to the twist, so you might need slightly different bullets than what you used before. And the third and most important thing I have, goes back to the barrel contour. How long between shots with the new barrel? A bull barrel dissipates the heat over more metal meaning the barrel heats more slowly, a hunting contour is more likely to heat immediately and need more time to cool between shots to remain accurate. I have a 270 with a very light contour that groups in the same hole every time, BUT I have to wait 30 minutes between shots to be accurate, and longer if the temp is above 80. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Help needed please ( 7mm Rem Mag ).
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