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G7 bc for .277 165 grain matrix vld

 
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  #1  
Old 01-20-2012, 09:49 PM
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G7 bc for .277 165 grain matrix vld

Can anyone tell me what the g7 ballistic coefficient is?
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  #2  
Old 07-22-2012, 07:36 AM
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Re: G7 bc for .277 165 grain matrix vld

I just caught wind of those bullets too. Never knew they made a 175gr vld for the .270! I wonder how that will affect barrel life though... I am going to email the company and ask them if they have any of that information to send over.
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Old 07-22-2012, 08:24 AM
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Re: G7 bc for .277 165 grain matrix vld

Try reading >>> 270 Win For Long Range Shooting
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Old 07-22-2012, 12:01 PM
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Re: G7 bc for .277 165 grain matrix vld

Not sure if Bryan has gotten around to this bullet yet, but the cacl G1 bc being 0.7381 it's close to their 168gr 7mm VLD which has a calc G1bc of 0.7136. I spose you could extrapolate and get pretty close (not exact) using the measure G7 bc of the 7mm 168gr which is 0.311 (berger 168gr VLD is 0.316) and apply <-- that to the 270 165gr. I figure it'll be in the neighbor hood of 0.315 - 0.325. Perfect? no. But I bet it would get you in the park
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Keep in mind the animals we shoot for food and display are not bullet proof. Contrary to popular belief, they bleed and die just like they did a hundred years ago. Being competent with a given rifle is far more important than impressive ballistics and poor shootability. High velocity misses never put a steak in the freezer.

Joe
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  #5  
Old 07-22-2012, 02:13 PM
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Re: G7 bc for .277 165 grain matrix vld

Checkout post #24 of 270 WSM 165gr VLD load help

G1= .636
G7= .326
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  #6  
Old 07-23-2012, 03:46 PM
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Re: G7 bc for .277 165 grain matrix vld

Post number 24 was an estimate. I have tested the matrix 175 here is the info for my testing.

G7=.3225

G1=.6435

My friend who has a similar test method as me has tested the 165 matrix at the following,

G1=.638

That would make the G7=.319

Good luck, make sure your scope tracks when your figuring out your drop data, if the click values are off on your scope it will mess up your solutions from your ballistics program and you will be chasing velocity and BC numbers trying to get it to match.
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  #7  
Old 07-23-2012, 08:52 PM
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Re: G7 bc for .277 165 grain matrix vld

Thanks for the advice and information I appreciate it.
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