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Headspacing FL Dies?

 
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  #1  
Old 12-15-2008, 07:06 PM
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Headspacing FL Dies?

Is it possible to adjust headspacing longer with full-length sizing dies, by increasing the gap between the shellholder and the bottom of the die?

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Old 12-15-2008, 08:45 PM
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Re: Headspacing FL Dies?

Yes. It's called "partial full-length" sizing, and it should be standard practice to avoid case-stretching. Redding makes a set of "Competition Shellholders" to simplify the process, but trial-and-error will also work. An eighth of a turn of the die is 0.009"; getting 1 or 2 thou isn't easy.
.
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Old 12-15-2008, 09:56 PM
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Re: Headspacing FL Dies?

Yes, but with a different spin.

I believe full length sizing has occured when we size full length properly, i.e, properly bumping the shoulder to fit. It's not when we have jammed every possible thousanth of the case into the size die in a willy-nilly manner. I mean, it's the treatment of the case that matters when FL sizing, not to be determined by the tolerances of a die and shell holder, right?

I rarely "FL" size the "right" way by fully jamming a case into a die. Sometimes that's needed but only sometimes. It's much better to only insert our cases enough to allow them to chamber easily. I think - am certain, actually - the reason so many "experts" say to only FL reload a case five times and toss them to prevent head sperations are over FL resizing by "following the makers directions", creating the effect of excessive headspace and resulting stretching.

Some of my hot loaded 30-06 cases have been loaded as many as ten times. In fourty years have never had a head seperation nor any indications of one. My cases die by neck splits and an occasional annealing stops most of that. If I had not sized my cases correctly, to fit my chamber, rather than "right", they would not have last nearly so long.

Last edited by boomtube; 12-15-2008 at 10:04 PM.
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Old 12-16-2008, 09:52 AM
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Re: Headspacing FL Dies?

Thanks guys. In order to check this out, what do you think of Hornady's headspace guage?

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Old 12-16-2008, 01:01 PM
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Re: Headspacing FL Dies?

It's a very good tool to measure the "headspace" of YOUR fired (and resized) cases. So is the RCBS Precision Case Mic.

Carefully adjust your FL die to set YOUR shoulders back about 2 thou and you will have "full length" resized them properly to fit YOUR chamber, if not your cousin's or SAAMI's.
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Old 12-16-2008, 06:52 PM
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Re: Headspacing FL Dies?

i just learned that the quality of your die can hinder you getting the correct shoulder bump. i switched to forester dies from rcbs and found it was easier to get the. 002" i like and have some fairly tight chambers on my rifles.
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Old 12-16-2008, 08:47 PM
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Re: Headspacing FL Dies?

Quote:
i switched to forester dies from rcbs and found it was easier to get the. 002" i like and have some fairly tight chambers on my rifles.
PJ, that's good but you can save some money by lightly grinding 2-3 thou off the bottom of any die that's too long. It won't hurt a thing and you can easily raise the die if you need to use it for a longer chamber later.
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