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neck runout with redding bushing dies???

 
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  #8  
Old 03-10-2003, 04:51 PM
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Re: neck runout with redding bushing dies???

Bounty Hunter, I measure after neck sizing on a case master guage. The loaded rounds are the same. I beleieve that it is in some way related to the neck die. I will be receiving the collar to eliminate the expander ball, and we will see what happens.

What dies are you using to get that small run-out on your rounds?

I am using lapua brass, which gives a variance of up to .003" on the random cases I tested right out of the box. I may have to invest in a neck turning set-up. The chamber isn't a tight neck, but it is definitley not a factory chamber either.
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  #9  
Old 03-10-2003, 06:09 PM
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Re: neck runout with redding bushing dies???

JustC

My 6.5/06 die is custom on a newlon blank. The 300 WSM is redding FL sizer and shoulder bump die with forester bonanza br seater. My 338 AI is Neil Jones set and my 6mm BRH (6 BR w/shoulder blown forward .180) is also neil jones. My 300 win mag is Forester BR set with JLC bushing converion and on and on.

I only use either Redding comps, Forester BR sets with JLC (Jim Carstenson, advertises in Precision shooting) bushing conversions ($35)or Neil Jones custom sets ($275.

You are not neck turning, I am think you will find once you buy a neck turner (get the K & M tool(Advertises in precision shooting and is best) with the carbide donut pilot, that your problems will disappear. after turning just enough to clean up the high spots measure loaded round and order a bushing .002 under loaded round size. Be sure and order the expanding mandrel to match the pilot. Use imperial die wax or a good lube on inside of necks and outside. Use power screw drivers with Sinclair shell holders for power drivers to get an even and smooth cut. If you do it by hand, it will leave grooves. Much quicker to use the B & D powerscrewdrivers with interchangable batteries. Will get about 20-40 cases per battery, so have extra batteries.

Lapua is the best brass, and always my first choice, but even they have variances in the neck. Only way to get rid is to neck turn to at least some degree.

Good luck

BH
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  #10  
Old 03-10-2003, 06:16 PM
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Re: neck runout with redding bushing dies???

Thanks BH.
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  #11  
Old 03-11-2003, 12:39 AM
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Re: neck runout with redding bushing dies???

catshooter, this rifle will be used in 600yd and possibly 1000yd matches over the next few years. I wish to eliminate ANY variable before having my ***** handed to me by the Big Dogs. I'm new to the competition thing, so I already have my work cut out for me. That is the reason I am so bent on getting the necks right. I will settle for a max runout of .001".

The brass is lapua, so I figured I am starting with some of the best going.

For whatever reason, my Redding BUSHING dies have the expander ball. It sure enough measures .284. They usually have the decapping collar in a bag inside the box, for you to eliminate the expander ball, but my set was missing that collar. Redding is sending me a new one for FREE. I told them I needed a new 6.5 collar as well, and they said, NO problem it's in the mail.
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  #12  
Old 12-20-2004, 03:57 PM
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Re: neck runout with redding bushing dies???

Old topic but, might be of interest...

A "FL non-bushing type" die is the only type die that will reduce or eliminate RO by sizing.

A bushing when used in a FL or NK die floats laterally, as the bore it sets into is slightly oversize (and this oversize bore in my opinion is totally unnecessary, and can actually allow RO to form in sizing).

The source of the RO is the first thing to look for and to correct.

Here's the facts though; The body of the case must be held tighly (a FL die does this) before the case neck enters the neck sizing bore. The neck sizing bore must be concentric to the body bore and must not move laterally (like a bushing will) in order to force a neck with RO back to center, or into concentricity. This RO problem simply can not be corrected with a commercial neck bushing die the way they are currently machined oversize, you will need a conventional FL die to do so.
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  #13  
Old 12-20-2004, 05:16 PM
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Re: neck runout with redding bushing dies???

Brent,
I noticed that you are from Alaska(awesome state) but tomorrow is the shortest day of the year (dec.21st) the darkness must be playing games with your mind if you think that a standard FL die is the way to concentricity.
Your reasoning has some merit except for the fact that standard FL dies oversize your brass then when you expand it back out is when your concentricity problems take place,I will take a bushing neck die that gives me .001 runout any day over a FL die that will stretch my brass into a waste basket prematurely.
B
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  #14  
Old 12-24-2004, 06:24 PM
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Re: neck runout with redding bushing dies???

Brian

Improper die set up is what will help the brass to the waste basket, (read excessive headspace) not the dies fault though. True, factory FL dies ID's could be a little larger so brass "might" not work harden as quickly, but that is handled by annealing anyway, also the brass is far from ruined.

Is there some reason you think you can not get concentric necks with a factory FL die if the die's neck is reamed concentric with the body?

The bushing dies will not correct RO, and can even make it worse if any exists, twas my main point and to explain how, I believe.

In my opinion, a die that takes bushings that float in the bushing bore is not the most desirable set up.
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