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.260 neck bushing, help please

 
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  #1  
Old 08-09-2011, 07:15 AM
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Join Date: Aug 2011
Posts: 8
.260 neck bushing, help please

Hi all,

My first post and I am asking for help, very poor show and I am sorry but I am in desperate need of help!

First off, great site. I've read through lots of threads on this topic and there are some knowledgeable folk on here.

I have a .260 rem which I use a Redding Type s neck sizer for.
My lapua brass loaded has an OD of .294 and I have .291, .292 and .293 bushes.

.291 without the button gives reasonable results.
.292 with the button is rubbish, but still has an OD after sizing of .292 so I'm thinking the button is not expanding anything really and there is only light resistance on exit/up stroke.

Question is, do you think I should try a .290" bush i.e. who has had good results with 4 thou of tension?

Thanks in advance,

Will

Last edited by Milligan; 08-10-2011 at 09:14 AM.
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  #2  
Old 08-09-2011, 08:50 AM
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Join Date: Jul 2004
Location: Texas
Posts: 5,421
Re: .260 neck bushing, help please

Quote:
Originally Posted by Milligan View Post
Hi all,

My first post and I am asking for help, very poor show and I am sorry but I am in desperate need of help!

First off, great sight. I've read through lots of threads on this topic and there are some knowledgeable folk on here.

I have a .260 rem which I use a Redding Type s neck sizer for.
My lapua brass loaded has an OD of .294 and I have .291, .292 and .293 bushes.

.291 without the button gives reasonable results.
.292 with the button is rubbish, but still has an OD after sizing of .292 so I'm thinking the button is not expanding anything really and there is only light resistance on exit/up stroke.

Question is, do you think I should try a .290" bush i.e. who has had good results with 4 thou of tension?

Thanks in advance,

Will

Normally you would go with .291 bushing if the loaded size is .294 to get around .003 thousandths
sizing.

Some brass has more spring back and you have to go .001 smaller.

After you size one, mic. it and see what size it realy is and this may help you decide on a bushing.

The bushing dies dont use an expander ball so the up stroke should be light. What you are feeling is the spring back.

If you try a .090 bushing and it works you will be fine until you anneal your brass and then you
may have to go back to the .091 bushing.

J E CUSTOM
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  #3  
Old 08-09-2011, 01:22 PM
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Join Date: Aug 2011
Posts: 8
Re: .260 neck bushing, help please

Thanks for that, I suppose there is no harm in trying.

To be clear on the button; the dies I have came with an expander ball and an alternate screw on piece which just holds the decapping pin.

I've tried it with the expander and .292 - which is when things go wrong.
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  #4  
Old 08-09-2011, 04:42 PM
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Join Date: Aug 2003
Location: NC, oceanfront
Posts: 3,224
Re: .260 neck bushing, help please

Yeah atleast Redding have expander buttons.
Milligan what do the fired necks measure?

Also, it seems to me that a sized neck OD of .292(2thou under loaded OD) would provide plenty of grip.
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Old 08-09-2011, 06:40 PM
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Join Date: Jan 2011
Posts: 2,103
Re: .260 neck bushing, help please

As Mikecr mentioned you need to mic the neck of a fired round and size it down no more than .004-.005", for example I have a 6.5x284 with a .297 neck depending on what I'm loading I use .293 and .294 bushings if you sizing more than .005" then your working your brass to much.
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  #6  
Old 08-10-2011, 07:33 AM
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Join Date: Aug 2011
Posts: 8
Re: .260 neck bushing, help please

The fired stuff comes out and .297" I think, but don't have it to hand.

Do you think there is a possibility then that the expander ball is causing problems? i.e. out of round etc
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  #7  
Old 08-10-2011, 07:43 AM
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Join Date: Jan 2011
Posts: 2,103
Re: .260 neck bushing, help please

Mic the expander all the way around, probably around .263", you may wanna try to use a standard redding neck die for the 260 that should give you a .292" and that's as tight as it ever needs to be if your chamber has a .297 neck, sounds normal .297, .298 depends on who done it but that's about right.
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