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300 SMK's BC???

 
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  #8  
Old 08-16-2008, 01:39 PM
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Re: 300 SMK's BC???

From 2500-2800 fps 0.770 is about perfect at my elevation.

At 2900-3100 fps I have found that 0.790 is perfect.

At 3300-3500 fps, I have used 0.800 to 0.820 depending on rifle.

These are all out of 1-10 barrels of different chamberings for the various velocity ranges.

For an all around average I always use 0.800 and that will get you extremely close with any velocity out to 1K so you can tweak your drops from there.
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  #9  
Old 08-18-2008, 01:30 PM
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Re: 300 SMK's BC???

Yes---Kirby is right about the BC---your software will tell you what the drop is at a specific range. For guys like me who shoot 1k BR this is very important esp. when I am shooting longer ranges at the ranch. When you look at the BC and the TOF along with the wind speed and how long the velocity stays within a specific speed it will make your head hurt to try and figure this out---use software!! The drop is only one part of the equation windage is the other!!
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  #10  
Old 08-18-2008, 08:29 PM
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Re: 300 SMK's BC???

Does anyone know what the new 300grn scenar is? I havent found any published BC not even on lapuas sight?

Jason
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  #11  
Old 08-18-2008, 08:59 PM
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Re: 300 SMK's BC???

I'll second Kirby's observations on the low and high end. Those #'s work real well out of an edge and out of a 338 AM.
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  #12  
Old 08-18-2008, 09:48 PM
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Re: 300 SMK's BC???

Sierra's published B.C is right on with my rifle. My velocity is around 2825 fps. The barrel has 9.3 twist.
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  #13  
Old 08-18-2008, 10:55 PM
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Re: 300 SMK's BC???

I'm confused. :confused: No more!
Sorry guys I need to rest.
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