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6X47 Lapua chamber reamer

 
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  #1  
Old 12-15-2012, 08:08 PM
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6X47 Lapua chamber reamer

Hi, I'm building a 6X47 Lapua. I'm using Pacific. Neck of .272. Using Berger 105gr. match hybrid # 24433. with a dumy load Oal at 2.800 I have only 1/8 neck holding the bullet I would like 1/4 2.800 is Bergers sugested OAL.. I asked Pacific for .030 freebore maybe even zero freebore. They say .090 is best. Throat angle 1-30. Neck with bullet is .269. Am I overly concerned?
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  #2  
Old 12-16-2012, 12:17 AM
Edd Edd is offline
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Re: 6X47 Lapua chamber reamer

I think a 2.800 OAL is too long.
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  #3  
Old 12-19-2012, 12:18 AM
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Re: 6X47 Lapua chamber reamer

2.635 is my coal with berger 105vld.

My reamer is .272nd and .104fb.

Go with the .090fb as suggested.

Kyle
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  #4  
Old 12-19-2012, 01:21 AM
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Re: 6X47 Lapua chamber reamer

Seat your bullet so the bearing surface/boat tail junction is just slightly ahead of the neck/shoulder junction of the case. When I do this with my 6-47, the OAL with Custom Competition bullets is 2.625" and they're just touching the rifling.

If only 1/8 of the neck is holding the bullet, you'll run out of neck before you ever get a really good load developed and drops figured. The throat on the gun will erode from firing and you'll have to seat the bullets out further if you wanna be close to the lands. I think 2.8" is probably too long.

You can send the dummy (loaded how you want it) to Pacific, or just call Dave and tell him your specifics and he should be able to go off of that.
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  #5  
Old 12-19-2012, 06:23 AM
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Re: 6X47 Lapua chamber reamer

Thanks I sent a dummy round at 2.725 OAL to Pacific. Wayne
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  #6  
Old 12-20-2012, 12:16 AM
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Re: 6X47 Lapua chamber reamer

When I had mine ground I he suggested the a .123 FB. That way I could use either the 115 or 105's.
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