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Measuring Bullet Bearing Surface

 
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  #1  
Old 03-08-2004, 05:58 PM
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Measuring Bullet Bearing Surface

What are you using to measure bullet bearing surface? Can you also measure boat tail variance with the same tool?
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Old 03-09-2004, 01:28 AM
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Re: Measuring Bullet Bearing Surface

home made

a piece of window glass with a light coat of paper ink ( same as use for news paper or artist work ) you roll your bullet on the window glass and ink print the bearing surface after you can easy measure with a caliper or a rule

this method allow you to show pressure ring or uncylindrical bearing surface

another way is to built a small frame for a old ( low cost or get from junk ) slide projector and display the bullet on a white wall , scale factor is easy to get with bullet lenght ratio .

good shooting

DAN TEC
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Old 03-09-2004, 02:34 AM
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Re: Measuring Bullet Bearing Surface

Troy,
I use the Stoney Point tools.

BT variance in which way?
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Brent Moffitt
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Old 03-09-2004, 01:39 PM
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Re: Measuring Bullet Bearing Surface

me too--2 stony point tools on calipers. I wouldnt worry about the boattail if the BS is good [img]images/icons/wink.gif[/img]

JB
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Old 03-09-2004, 03:24 PM
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Re: Measuring Bullet Bearing Surface

Brent

how you measure bearing surface lenght with a stoney point ?

good shooting

DAN TEC
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Old 03-09-2004, 09:16 PM
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Re: Measuring Bullet Bearing Surface

Thanks for the answers gents. I am going to check out the Davidson collars listed in Sinclairs. I was just wondering what people were using. I have been shooting really good CRO bullets but want to try a different caliber and will need to measure bullets.
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Old 03-09-2004, 09:57 PM
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