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  #21  
Old 02-10-2017, 03:07 PM
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Sheeeesh! This has been a lot of posting over 13 pieces of brass that didn't chamber. Appreciate all the technical insight, I really do. Given that common element is the 09 WCC headstamp, and that nothing has ever happened like this to me with any other brass, I am not losing sleep over it. I have learned a way to measure the datum from Monty and I thank him for that. Now, I will get back to reloading my cast bullets in all my other headstamped brass. Thanks again, everyone. Now, let it rest.
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  #22  
Old 02-10-2017, 04:05 PM
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OK, I do have something else to add. I have now pulled the bullets from the offending brass and done measurements using the method Monty suggested with a spent .40 S&W piece of brass to measure the datum on the shoulder. Here's what I got: The one that successfully chambered and was fired measured 2.469. The ones that failed to chamber measured an average of 2.482. That is a difference of .013. Now, for comparison, I measured several new, unfired, ready to reload right out of the box Nosler .308 brass and they were consistently 2.468. I spot checked several of my other pieces of brass (all once or twice fired and collet neck sized only) and they were also right around the 2.469 measurement. Finally, I full length sized the offending brass, making sure the die bottomed out on the shell holder with no slack in the system whatever. They came out measuring 2.480! They just won't size down and stay down. Now, they were all fired previously at our range, but not with a full auto gun. They did come out of something with a fluted chamber though. I have used brass from fluted chambers in the past for my low pressure cast bullet loads with no problems. Thus far, I have never had a failure other than the 13 aforementioned WCC 09 headstamped pieces. In conclusion, the offending brass is going for scrap, and as I scavenge brass in the future, I will use Monty's suggested method of checking the datum. Or, if I feel flush sometime, I might buy one of those chamber checkers from Lyman or another vender. Likely, I will do that sometime.
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  #23  
Old 02-10-2017, 04:23 PM
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One more thing, there is no indication internally with the offending brass of case stretching near the case head. I checked every one of them with my trusty, and expensive, bent paperclip feeler.
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  #24  
Old 02-11-2017, 03:56 AM
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Hk?

Need some information: Fluted cases around here mostly come from HK rifles. I know from experience that brass from the HK770, the sporting rifles, was reloadable. Once, the wrong die was employed and the result was a fluted 300 Savage case. How do you account for the difference between the WCC brass and others when you full length resized? When doing your measurement with the 40 cal case how to you account for the difference is web thickness? Thanks for your help.
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Old 02-11-2017, 05:36 AM
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Pour a chamber cast and a die cast and MEASURE the things!! Why guess?
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Old 02-11-2017, 06:47 AM
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Using the .40 brass method, I am measuring from cartridge base to cartridge base. The web doesn't get into it. Annealing the cases appears to be the solution to using the 13 offending cases, as they won't size back down. Perhaps I will try that, perhaps not. I really don't need the 13 cases.
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  #27  
Old 02-11-2017, 07:39 AM
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Byrl, you have an extreme instance with those pieces of WCC brass. I've run into similar cases of "spring back" before but not to that extent.
Think I'd try annealing those cases, not that you need them, but to satisfy curiosity.
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  #28  
Old 02-11-2017, 08:18 AM
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Quote:
Originally Posted by JBelk View Post
Pour a chamber cast and a die cast and MEASURE the things!! Why guess?
I am always curious about chamber casting and what reloaders expects in the way of information when finished. I have been chamber casting for years; problem, I did not learn anything from the Internet. Anything I can learn from chamber casting I ca learn from case forming.

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  #29  
Old 02-11-2017, 09:04 AM
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Good on you, byrl, for actually MEASURING something so you know what the problem is. I am forever horrified by the advice "turn the die in a little more" or worse, "you need a small base die" when no one actually has any idea what the problem is.

Fluted chamber may well be an HK as stated above. In any case... pun intended... those WCC cases are well-abused and not suitable for reloading, in my opinion.

Don't guess, measure!
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  #30  
Old 02-11-2017, 09:42 AM
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Quote:
I am always curious about chamber casting and what reloaders expects in the way of information when finished
A reloader has the dimensions of his chamber which is different than a fired case. He also has a true representation of his chamber to look at for tool marks, pits, scars and marks. He can see the throat, the lead and the start of the bore and examine it under a variety of light and magnification.

Every custom barrel job has a cast made of the chamber to be SURE it's right. Chambers that are 'improved' or are being polished to remove a defect is cast so it can be SEEN.
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  #31  
Old 02-11-2017, 01:18 PM
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Die Instructions?

Die instructions? Web of cartridge case?
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  #32  
Old 02-11-2017, 06:44 PM
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Just to set everyone's mind at ease, I do use any range brass I can scrounge, but only for relatively low pressure cast bullet loads. And since I do shoot a lot of cast for every gun I own, most of what I shoot is range brass. Now, on the other hand, when I am handloading jacketed bullets, I use only virgin brass (like the Nosler referenced earlier) or factory rounds that have only been fired in my guns. I still have a fair number of pieces of Winchester .308 brass that originated from me buying factory rounds when I first got my .308 years and years ago. Honestly, when I get good brass, I usually end up selling it through a group on Facebook and I keep the less savory stuff for my own use.
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