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Very Hot Topic (More than 25 Replies) 32-40 case damage (Read 20166 times)
westerner
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Re: 32-40 case damage
Reply #15 - Aug 16th, 2015 at 3:28pm
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With a little practice, anyone can load a charged case in just about any rifle without spilling the powder. Some lift the muzzle when inserting the shell, some do not.   

It's not a circus act or rocket science. Well, maybe it is on the innermet. Not in real life when actually doing it, lol. 

           Joe.
  

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frnkeore
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Re: 32-40 case damage
Reply #16 - Aug 16th, 2015 at 4:33pm
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I'm also a one case shooter and people interested in "traditional" shooting would fall more into that way of loading. It's not as slow as people would try to make you believe. I've resently shot two CBA matches, using one case.

As for the expense of re-decapping, you can get a Lee capper, usually for under $30 and a 310 tool with a decapper die, very economically. I have lots of 310 decapper dies. They are probably the most offen found 310 die.

I NEVER put anything past the case mouth, I rang a barrel that way, before Charlie did his experiments but, I STILL cringe at the though of it! Once bitten, twice shy! The ONLY way that I know of to ring a chamber (my case) or barrel is to put something in the case!

I've tried many different type wads at the case mouth but, found no difference in my rifles. As far as spilling powder w/o a wad, I load short cases in a Borchardt and a HW, probably the hardest actions to load a case in. My ELCO 33 Max in the Borchardt, with up to 16 gr of powdwer and the HW gets a 32/20 case with up to 11 gr of powder and my 30/30 Wesson in my Hoch with up to at least, 16 gr powder. It's my wifes rifle and she loads it w/o trouble, that way, too. A external scope, with it's taller mounting gives more room, too. But, she was able, with her smaller fingers to load it with a low mounted modern scope. I had trouble but, still got them in w/o spilling.

I think many people just assume they can't load the smaller, shorter case and haven't applied themselfs to the task. I know that I could load a MS in a Miller or Hoch, if I had one.

Regarding the short cases being to tight to chamber or extract, that is only do to chambers not cut the right size or way.

Frank



  

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JLouis
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Re: 32-40 case damage
Reply #17 - Aug 16th, 2015 at 6:15pm
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Hard extraction due to swelling of the web is brought about by to much pressure and the subject at hand of which has absolutely nothing to do with how a chamber was cut. That and hard insertion of a properly sized case would be an entirely different subject than what is currently being disscussed.

JLouis
  

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frnkeore
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Re: 32-40 case damage
Reply #18 - Aug 16th, 2015 at 7:03pm
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J Louis,
You are fimilar with my 33 ELCO Max. I shot the whole match of 65 record shots at your range, with one case. I have NEVER had case extraction issues with it and I have run pressures high enough to pierce primers. I've run 10 shot groups at 1600+ fps with my 240 gr bullet. 

The only time that I ever have any trouble inserting a case or extracting one, is after hundreds of firing with the same case and never a stuck one. Resizing and they are good for more than a hundred more shots. I used one case to shoot the entire Spokane match (over 240 rounds). My normal velocitys are 1475 fps, no slutch in the pressure department!

On a tapered case, if the case head area isn't about .002 larger than the solid head (.200 - .250 forward of the rim) you will have the problem of sticking. Many, many MS have that problem, for that reason. The orginal chamber drawing was not large enough in that area, at least the PTG reamer drawing show that.

On a tapered case, if your case sticks, the chamber at the front of the case head is to SMALL.

Frank
  

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Schuetzenmiester
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Re: 32-40 case damage
Reply #19 - Aug 18th, 2015 at 2:54am
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Sendaro wrote on Aug 15th, 2015 at 4:57pm:
Then I noticed the cases. I have provided a photo here for you to see the cases used with the wad  seated on the powder charge and what was happening to them. The only difference was where the wad was placed. Would like to hear your thoughts about this. I went back to loading with the wad at the mouth of the case and the problem stopped.

                    Sendaro

My 25 Hornet will do that nearly every shot  if I shoot without floral foam at the mouth of the case.
  

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Re: 32-40 case damage
Reply #20 - Aug 18th, 2015 at 8:28am
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OK here is my W.A.G. When the wad is in the case mouth it giver just enough resistance so that the powder explosion expands at the neck, sealing the chamber. When the wad is placed down further it causes the case to expand in the body leaving the neck relatively untouched. As the pressure flows up the barrel it hits the bullet and looks for the path of least resistance and flows out between the case and chamber puckering the mouth.

40 Rod
  
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Re: 32-40 case damage
Reply #21 - Aug 18th, 2015 at 9:46am
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A slight adjustment of the bullet seating depth will generally correct the problem without having to bell the mouth of the case if the case / cases are fully fireformed. I just recently picked up a 25-21 from a friend who was having an issue with collapsing cases and at a very rapid rate. I re-adjusted the seating depth and I have not lost one case to date. I have over 500 shots on the single Bertram case I am currently using, it doesn't require any belling of the mouth all though it is something I am trying to get in the habit of doing. I have also corrected the same collapsing issues with the 32-40 and 33-47 in the same mannor in the past.
I developed my own means and methods for determining what I feel is the correct breach seating depth several years ago and I really haven't had a problem with collapsed cases since?

I might add that I do not us a wad in any of my cases.

JLouis
« Last Edit: Aug 18th, 2015 at 9:57am by JLouis »  

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Re: 32-40 case damage
Reply #22 - Aug 18th, 2015 at 10:12am
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"swelling of the web is brought about by to much pressure"

Not to sure of that. Shooting Black Powder in my 40-65, after about 50 60 shots on a case I'd have to shove the case in to a full length sizing die with out a shell holder, then knock the case out with a brass drift I made.
Once that was done the cases no longer extracted a bit hard. 
I do the same thing with my 32-30 Imp now after so many shots.

As for using a wad, I do. And set it .200" off the powder.
I feel it gives me consistent ignition of the charge.  The powder is in the same position each shot.
I was taught constancy is a good thing.
  
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Re: 32-40 case damage
Reply #23 - Aug 18th, 2015 at 11:38am
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I've done some tests to determine what it takes to collapse a .32-40 case mouth.  For the base line, I incrementally raised the powder charge until the case collapsed using two different .32-40 rifles. 

From that, I can say with some confidence that over-pressure causes case mouth collapse. 

John Louis is correct that bullet seating depth can solve the problem as increasing depth raises the effective chamber volume and thereby decreases pressure.

I tried seating floral foam wads on the powder charge and found that cases would collapse at lower powder charges than were required to collapse the case without the wad.

I also tried a variety of wads at the case mouth.  Some wads would collapse the case mouth, other did not. And, the case mouth wads were not consistent in causing damage.  Case mouth collapse was a more random event.

My conclusions were that wads, of any sort, were not beneficial in the .32-40.

Smaller cases are another story.  I use Schuetzendaves, pipe insulation wads in the .32 RKS and newsprint wads of my own design in the .32-20 CPA without problem.

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Re: 32-40 case damage
Reply #24 - Aug 18th, 2015 at 11:56am
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Quote:
Smaller cases are another story.  I use Schuetzendaves, pipe insulation wads in the .32 RKS and newsprint wads of my own design in the .32-20 CPA without problem.

JackHughs


Did the wads increase the accuracy of those cartridges or where you using them just to keep from spilling powder?

I've tried LDPE (1/16), Floral foam and pipe insolation wads in the case mouth of my 33 ELCO and found no accuracy improvement. I can load fine w/o spilling so, I didn't continue there use.

I agree that the collapsed necks are random and maybe the smaller capacity cases have a advantange in that respect. I could be wrong but, I can't ever remember collapsing a neck on my 33 ELCO, if I did, it would be very, very rare as I don't remember.

Frank
  

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Re: 32-40 case damage
Reply #25 - Aug 18th, 2015 at 12:13pm
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frnkeore wrote on Aug 18th, 2015 at 11:56am:


Did the wads increase the accuracy of those cartridges or where you using them just to keep from spilling powder?

Frank


Hi Frank,

I have to use wads in the smaller cases to keep from spilling powder so I can't say if they improve accuracy over not using wads.  In the .32 RKS the pipe insulation wads work better than others I've tried.

The newsprint, over-powder wad in the .32-20 CPA is the only loading configuration I found that provided acceptable accuracy for that case.

While I've never collapsed a smaller case, I've encountered loads that result in significant blow-by which makes a giant mess.  With the .32 RKS, I had blow-by past the rim using floral foam wads.  The pipe insulation wads do a great job of mitigating that problem.

JackHughs
  

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Re: 32-40 case damage
Reply #26 - Aug 18th, 2015 at 9:58pm
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I haven't worked with the 25 Hornet.  I'll give a little deeper seating a whirl.  Thanks.
  

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Re: 32-40 case damage
Reply #27 - Aug 19th, 2015 at 12:03pm
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I've never tried floral foam, but have used butcher tray foam. From your grocery store. Until I tried the fire test on it. Which simply is trying to set it on fire with a lit match. It burns and melts like a piece of plastic. I went back to cork. I didn't like the idea of melted plastic in my barrel.

Jack
  

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Re: 32-40 case damage
Reply #28 - Aug 19th, 2015 at 12:15pm
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By the way does anyone use 1/8" cork wads seated about 1/16" deep at the case mouth? And if so what results, pro or con, are you getting?

Jack
  

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Re: 32-40 case damage
Reply #29 - Aug 19th, 2015 at 2:25pm
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.095" cork, .200 off powder, results:



  
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