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Update on head space and stuck case problem.

 
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  #1  
Old 10-13-2012, 01:28 PM
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Update on head space and stuck case problem.

In a couple of my previous posts I mentioned I had stuck a case in my redding full length s bushing die. Removed with extractor (whew). Using redding imperial case neck lube it sizes easy now. I still have a head space problem which may well be the case holder. I'll explain and listen to your ideas. This is a 25-06 and it is obvious when looking at new and 1x brass there is a huge diffrent in angle of shoulder. I am using a redding full length s bushing die with expander removed. I am using an RCBS #3 case holder in a Rockchucker press and winchester brass. The die is set in the press deep enough to get a good but not to stiff cam over when the press is fully raised, just as you might have it when sizing virgin brass.The once fired brass before being resized measures between 2.032 and 2.034 using the hornady head space gauge. The brass is lubed and run through the die then wiped of and remeasured The head space does not change when checked. Still in the 2.032 to 2.034 range. Putting the brass in the chamber makes for a little bit of stiff bolt but not terrible. The cases length when virgin was trimmed to 2.484 using the sinclair/wilson micro-trimmer after one firing they have grown to an average of 2.491 I am working 89 rounds and they all show the same appx. measurments, so this is a goodly amount to show and not an anomaly. I also have an RCBS FL sizing die and it is also set with a cam over for virgin brass when using it the results of head space are the same. Lets hear yals thoughts. Brad
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Old 10-13-2012, 01:48 PM
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Re: Update on head space and stuck case problem.

Is it camming over against the shellholder?
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Old 10-13-2012, 02:03 PM
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Re: Update on head space and stuck case problem.

yes
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Old 10-13-2012, 03:00 PM
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Re: Update on head space and stuck case problem.

It sounds like you're doing what is reasonably expected
How much differential is there in diameters near webs and at shoulders, between new, fired, & sized case?
What does your head space gauge measure on NEW brass?
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Old 10-13-2012, 05:26 PM
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Re: Update on head space and stuck case problem.

"Cam over", as such, means nothing, all that matters is how far the cases go into the sizer.

Put a case in the shell holder, push the ram fully up and look under the die to see if there's a sliver of light between it and the shell holder. If there is, and I suspect there is, turn the die down until the gap is closed.
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Old 10-13-2012, 11:07 PM
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Re: Update on head space and stuck case problem.

Without a case in the press the die bottoms out aginst the shell holder but, as boomtube stated with a case in the shell holder there is a thin amount of light seenbetweenthe die and the side of the shell holder. I don't have any virgin brass left so I don't know how they measure aginst each other. howevr it's visually obvious that the virgin brass has a much sharper anglt to the shoulder than the 1x brass. Brad
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Old 10-14-2012, 09:18 AM
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Re: Update on head space and stuck case problem.

Quick question, why would you set the shoulder back on new brass? You should be fireforming the new brass to your chamber and then adjusting the die to resize just enough for a good fit. So, try running new brass through the FL die just enough to straighten the neck, seat the bullet out far enough that it forces it into the lands and pushes the case base into the bolt face to adjust the headspace and adjust the FL die to where the bolt has just a slight amount of resistance when caming over. This should help.
db
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