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 10 Don’t Shoot The Zoot (Read 3505 times)
RicKrager
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Don’t Shoot The Zoot
Jun 22nd, 2020 at 6:52pm
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Greetings All,

Returning to loading after a long hiatus (1981 to present - how time flies) I have found these many pages in the KCA Forum to be most helpful. I was taken by the suggested load as referenced ButlersRangers, 110grain RN over 26gr of IMR-4198 = `2000fps. I loaded a small number as a test and was satisfied my rifle seemed happy.

Now I am loading the rest of the box of bullets in my collection of old brass. Turning to a box, ~50 rnds, of headstamp “WRA Co. .30 ARMY” all was well until it wasn’t. The photo will show the cause of my concern. I pulled this round out of the press and the first thought was, “it reminds me of a zoot suit!” Granted, there may not be many left who will understand the  so I will say - flared shoulders.

This particular round measures 0.433” while the SPEER reference dia. is 0.4190 as is the Sierra. After three more cases exhibited similar but not as drastic deformation I thought I might need to clean out the case necks to ease the bullet home. Meanwhile the other part of my brain mulled over the implications. Should I try to chamber these rounds and fire form? But would the case fail, leaving me with a real mess - at least? Perhaps I should break them down, save the powder and bullet and try to pop the primer at the range followed by full length resizing the case.

Or is there another explanation I haven’t considered? I am not sure I want to force chamber these four rounds. That seems too risky. I hope there is value in mentioning this as it may be an issue another might encounter. Are there reports of cases being too soft in the shoulder area?

I await further information and thank you in advance if you have a perspective.
  
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Parashooter
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Re: Don’t Shoot The Zoot
Reply #1 - Jun 22nd, 2020 at 7:54pm
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The cartridge shown exhibits the typical deformation that occurs when we attempt to crimp the case mouth onto a bullet where there is no cannelure to accommodate the crimp. The remedy is to back off the seater die far enough so its crimping shoulder doesn't contact the case mouth during seating - or select a bullet with cannelure and adjust die appropriately.

The same effect may occur intermittently if some cases in batch are longer than the case for which the die was adjusted. Be sure to trim cases to uniform length before loading them.

If the loaded rounds with buckled shoulder can be chambered with a firm turn on the bolt handle, they can be fired as safely as undeformed rounds with the same (safe) charge/bullet/primer - unless the cases are so long they're running into the chamber mouth and pinching the bullet (BAD). If they will not chamber without excess force, they can be pulled down, trimmed, and FL sized (without decapping pin) to restore usable form.

Seat/crimp die adjustment instructions (Lee, but same for other makes)-

INSTRUCTIONS:Screw the bullet seating die in until you feel it touch the case mouth. If no crimp is desired, back the die out 1/2 turn. If a crimp is desired, turn the die in 1/4 turn. The bullet must have a crimping groove or it cannot be crimped. Case must be trimmed to same length to provide a uniform crimp. Bullet depth is adjusted by screwing the adjusting screw in or out to suit. Bullets should be seated deep enough to work through the gun’s action. 
CAUTION Seating bullets excessively deep will reduce the case capacity and
increase the pressure
  
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RicKrager
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Re: Don’t Shoot The Zoot
Reply #2 - Jun 22nd, 2020 at 8:10pm
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Hi Parashooter,

Thank you for the information. For clarification, the seating die loaded about 75 rounds with no problems and was not adjusted to crimp. I will, however confirm the proper set up per your suggestion.

Had not considered a full length sizing after removing the primer pin from the die. It makes sense as you tell it and if necessary I will follow your direction.

As I hope to equal Paul’s number of reloads per case I hate to toss a case unless there is a dangerous situation. I have a small number (<10) with cracks forward of the shoulder over the years since I first started shooting this rifle in 1976. I recently broke down and bought 400 WW new brass. My thinking - we never know when the well will go dry.
  
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Whig
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Re: Don’t Shoot The Zoot
Reply #3 - Jun 22nd, 2020 at 8:14pm
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I agree. These have been deformed too much, in my opinion, to be used safely, though. I would discard these and use other undeformed brass.

Deformed brass like this can not only cause increased chamber pressures when shot but also may weaken the case at the neck where the deformation has occurred.

I have seen some of these in used brass that I have bought and I just toss them. I don't like to do anything that increases risk to me or my firearms!

But, they may shoot just fine. Be careful and watch the bullet seating like parashooter advised.
  
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butlersrangers
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Re: Don’t Shoot The Zoot
Reply #4 - Jun 22nd, 2020 at 9:25pm
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In addition to all the good points brought up by 'parashooter' and 'whig', your Brass, stamped "WRA Co. - .30 ARMY", is very old and likely has gotten brittle with age, (unless the necks have been annealed).

Personally, I don't risk reloading brass from the 1930's & 1940's.
(I'm Scottish, but, new .30-40 brass is available. Using brass older than me seems like false economy).

When I recently made 'reduced' .30-40 loads with the 110 grain RN projectiles, I noticed a bit more resistance to the bullet base entering the case-mouth, then I find with the heavier projectiles, I normally use.
(The brass used in my 110 grain 'reduced loads' was trimmed, de-burred, and pretty 'fresh').

Possibly, with 'stiffer' old brass, this resistance may have contributed to your partial case collapse.

I imagine 'flaring' the case mouth a bit would help the flat based 110 grain projectiles more easily enter old case necks.
Annealing, trimming, de-burring, and having the 'crimp' out-of-play should eliminate other potential bullet seating issues.
« Last Edit: Jun 23rd, 2020 at 4:23am by butlersrangers »  
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Parashooter
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Re: Don’t Shoot The Zoot
Reply #5 - Jun 23rd, 2020 at 12:53am
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Whig wrote on Jun 22nd, 2020 at 8:14pm:
. . . Deformed brass like this can not only cause increased chamber pressures when shot but also . . .

Please explain the mechanism by which a slightly buckled case as shown would "cause increased chamber pressures"?
  
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Whig
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Re: Don’t Shoot The Zoot
Reply #6 - Jun 23rd, 2020 at 2:30am
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Heck, I would think with a buckled case neck, it could hamper easy bullet seating and make a ring of resistance greater than it should be, like a strong crimp, and create a higher pressure when the bullet is trying to exit with powder pressure building behind it.

Also, the bullet may be seated deeper than it should with the shortened neck and create a smaller case volume for the powder and therefore higher pressure.

I don't think the pressures would be significantly increased but my comment was that I don't like to increase risk in any way when I'm dealing with reloading and shooting. There's enough inherent risk with shooting, especially 120+ old firearms, that we should be prudent to be as safe as possible.

Any increased pressures beyond normal with a possibly damaged case potentially increases risk in my book.

Anything wrong with my reasoning? I always like to learn from any erroneous logic!
  
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Parashooter
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Re: Don’t Shoot The Zoot
Reply #7 - Jun 23rd, 2020 at 4:34am
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Whig wrote on Jun 23rd, 2020 at 2:30am:
Heck, I would think with a buckled case neck, it could hamper easy bullet seating and make a ring of resistance greater than it should be, like a strong crimp, and create a higher pressure when the bullet is trying to exit with powder pressure building behind it.

Also, the bullet may be seated deeper than it should with the shortened neck and create a smaller case volume for the powder and therefore higher pressure. . .
Anything wrong with my reasoning? I always like to learn from any erroneous logic!

1. Look at the photo. It's the shoulder that's buckled, not the neck - and the stubby 110-grain bullet's base is nowhere near the shoulder.

2. As long as the die body and seating stem were in the same position as for the other loaded rounds, the bullet will be at the same distance from the base (i.e. same OAL). The buckled shoulder won't cause it to be seated deeper.

If RicK has a caliper handy, it should be easy to find out if his problem cases are longer than the others.
  
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butlersrangers
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Re: Don’t Shoot The Zoot
Reply #8 - Jun 23rd, 2020 at 4:48am
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I wouldn't bother because of the age of the brass, but, if 'RicKrager' wants to experiment with this brass, he could pull the bullets and salvage the powder.

The (primed) partially collapsed cases could be 'fire-formed' with a suitable pistol-powder load and paper towel wadding.

Once 'fire-formed', the case necks could be annealed, trimmed, and neck-sized, to ready them for 'reduced-load' use.
  
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Whig
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Re: Don’t Shoot The Zoot
Reply #9 - Jun 23rd, 2020 at 8:59am
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Thanks, Para. I still believe in extreme cases, things like divots and crushing can increase pressures. op's case may not be considered extreme.

Bullets are salvageable. If you're hurting for brass, maybe try to rework the damaged ones but I'd toss them. Too many unknowns with weakened and damaged brass. I've shot many old rounds and I have also had many necks crack. I don't like crushed cases. I would imagine accuracy could suffer also.

I have found it advantageous to chamfer my cases for seating and I use lube on every case before resizing. Helps to prevent these problems. Old cases can be scary!
« Last Edit: Jun 23rd, 2020 at 10:24am by Whig »  
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RicKrager
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Re: Don’t Shoot The Zoot
Reply #10 - Jun 23rd, 2020 at 1:15pm
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I want to thank you all for your perspectives on this item. also thanks to clansman butlersrangers - I admit I tend to be frugal with the brass. Perhaps the old WRA should retire. At this time in life I can afford new WW brass. That was not always true.

For a more complete picture I offer the following:
Case prep. For most of my primed brass, they were sitting primed since about 1980. That suggests sized, trimmed and de-burred at the neck (in and out) as that I did back then. They were not cleaned. Now to the present - they were wiped outside, then after successfully loading about 75 and experiencing the case collapse and the first of your replies I brushed out the necks and neck sized and loaded until I ran out of IMR-4198 (bought pre-1980).

With my dial caliper I had checked case length and loaded length. LOA was to butlersrangers suggested 2.760”. This dimension continued to be checked every few rounds due to concern over the few that showed slight bulging at the shoulder. I also, following parashooters’s comment, checked the seating die for crimp as he suggested. There seemed to be resistance with and empty case and the die was backed out a bit, one case loaded and LOA checked. I set the seater down a little to achieve 2.760”. Once convinced the rounds were within spec I loaded our the last of the 4198.

Future loading once past the lot of primed cases will include clean if not new, necksize, trim, chamfer, prime, load. With 500 more 110Gr. and several hundred more up to 180Gr RN, I will need more brass soon.

Thanks again to each of you for your input. My old shooter thanks you -
  
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butlersrangers
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Re: Don’t Shoot The Zoot
Reply #11 - Jun 23rd, 2020 at 4:58pm
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It's a good time to buy new W-W Brass. I believe Graf & Sons has it on sale.
  
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madsenshooter
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Re: Don’t Shoot The Zoot
Reply #12 - Jun 24th, 2020 at 1:40pm
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Zoots.  I remember having to ask an old friend what the heck a Zoot suit was.  That would have been back in the 60s.  He was a WWII vet that knew everything.  Well, almost everything.  I have an old file trim die that would fix your collapsed shoulder, no disassembly of the rounds needed.  It's the die I use to push the shoulder back on .303 British I sometimes shoot in my Krag.  It's also a good way to make sure you don't have any overlength cases to cause the problem.  Now I remember how the subject of Zoot Suits came up.  It was the plaid "leisure suit" jacket that I got my junior year, so the question to him would have been in the early 70s.
  
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Re: Don’t Shoot The Zoot
Reply #13 - Jun 24th, 2020 at 2:06pm
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Re: Don’t Shoot The Zoot
Reply #14 - Jun 24th, 2020 at 3:55pm
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Nice price on W-W brass, 'Culpeper'.
« Last Edit: Jun 24th, 2020 at 7:24pm by butlersrangers »  
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