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I'm considering Polishing the Inside kneck of my 7mm brass.

 
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  #15  
Old 06-25-2013, 09:21 PM
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Re: I'm considering Polishing the Inside kneck of my 7mm brass.

Outside neck turning mandrels really booger up the inside of necks, at least mine does. Lots of grooves and burrs



I use a Zip Trim, piece of scotchbrite and hemostat







and then a little mica




It might not make a difference in bullet release but it does help stabilize bullet seating pressure, at least IME
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  #16  
Old 06-26-2013, 08:18 AM
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Re: I'm considering Polishing the Inside kneck of my 7mm brass.

Quote:
Originally Posted by Mikecr View Post
This is a bad move. Polishing the inside of your necks will only serve to increase seating forces, which will lead to increased seating depth variance, and this can hurt accuracy.


Are you entering your brass in a 'shiny insides contest'?


NOPE. Won't change a thing there.

You can shoot as well as top competitors with a quick brush through necks & a swipe of primer pockets & a cycle through vibratory media -just like they do(if that much).
That thin carbon film in there? It's your friend. It reduces friction and very consistently normalizes seating forces.
+1 the carbon film in neck acts as a lubricant.Removing this by sonic/tumbling cleaning is like seating bullets in new brass.
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  #17  
Old 06-26-2013, 08:55 AM
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Re: I'm considering Polishing the Inside kneck of my 7mm brass.

I clean my cases sonically and i give the necks a spray with one shot lube to ease in bullet seating. It seems to help as my ES went way down once i started doing that.
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  #18  
Old 06-26-2013, 10:06 AM
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Re: I'm considering Polishing the Inside kneck of my 7mm brass.

What neck turning tool do you have?


Quote:
Originally Posted by woods View Post
Outside neck turning mandrels really booger up the inside of necks, at least mine does. Lots of grooves and burrs



I use a Zip Trim, piece of scotchbrite and hemostat







and then a little mica




It might not make a difference in bullet release but it does help stabilize bullet seating pressure, at least IME
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Joe
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  #19  
Old 06-26-2013, 10:17 AM
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Re: I'm considering Polishing the Inside kneck of my 7mm brass.

Forster Hot 100
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  #20  
Old 06-26-2013, 10:38 AM
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Re: I'm considering Polishing the Inside kneck of my 7mm brass.

UltraSonic Case Cleaning within AccurateShooter.com
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  #21  
Old 06-26-2013, 10:41 AM
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Re: I'm considering Polishing the Inside kneck of my 7mm brass.

I love the pictures, I really like the good use of the surgical clamp. I have them in my fly fishing tackle, I think ill put them to good use. I have never lathed the necks on my brass. Seems like taking brass away will shorten the life of it.
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