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Is this my FL die or is it really headspace separation?

 
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  #8  
Old 07-16-2011, 05:08 PM
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Re: Is this my FL die or is it really headspace separation?

I only bump 0.001" that's all, but what I noticed measuring previously fired brass before FL size and after i fired it again using stoney point headspace gauge increase by 0.007".
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  #9  
Old 07-16-2011, 07:05 PM
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Re: Is this my FL die or is it really headspace separation?

I have never used a Stoney Point guage, but I guess you mean the case length is growing .007" after one firing. If this is the case, you don't need to get upset because some cartridges just get brass flow in this manner. Yes, the brass will eventually thin out just in front of the webb but unless you want to shoot very reduced loads it is just the nature of the beast (so to speak). Some calibers that I think will be hard on brass doesn't seem to suffer at all and others that I think will be real easy on brass will need trimmed after every firing and will have to be replaced more often. In my thinking, if I can't get 6 loadings out of a piece of brass before having to throw it in the junk bin I am loading too hot or it is being over-worked because of an out of spec chamber. If you are only setting the shoulder back .001" during FL sizing you don't have a too long chamber at all. BTW, what cartridge is this in the picture? It looks like a 6mmBR, but I am usually not too good of guesser
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  #10  
Old 07-16-2011, 07:18 PM
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Re: Is this my FL die or is it really headspace separation?

Yes it is 6mmBR, and its headspace didn't grow at all, just at the field I took measurements, but after I removed primers it remain the same as it was before FL sizing. This is Norma brass, not very common for 6BR, usually Lapua is used. The Stoney Point headspace gauge is now made by Hornady here is what it looks like:



I think 6br is not bad for long range plinking ;-) at 500 yards it does less then 3" that's 5 shot groups using 105 - 107 grain bullets

Last edited by Jinx-); 07-16-2011 at 10:00 PM.
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  #11  
Old 07-17-2011, 12:20 AM
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Re: Is this my FL die or is it really headspace separation?

After I resize and bumping 0.001" of the sholders they start looking better, I think what I experienced has to do with new chamber, and brass was fireformed for the old Savage 6mm Norma BR. here what the brass looks now, nothing points to headspace separation....


Last edited by Jinx-); 07-17-2011 at 01:11 AM.
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