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1isenough
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222 rimmed - cartridge length dilemma
Jan 12th, 2020 at 6:29am
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Help!  Anyone out there know what the correct cartridge length is for the 222 Rimmed?  Wiki and some online discussions says it is 1.85", which is 222 Rem Mag length.  Other online discussions say it is a rimmed derivative of the 222 Remington, and the case length is 1.70.  I have some new Super 222R cartridges and the measured length is 1.694, suggesting the 222 Remington dimensions.  A reamer rental company just rented me a reamer and it cut a rimmed chamber at 1.85".  I either have a incorrectly chambered barrel, or a bunch of bad cartridges.  Please help me decide which.  Either way, I won't be getting this Martini Cadet to the range anytime soon.
  
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GWarden
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Re: 222 rimmed - cartridge length dilemma
Reply #1 - Jan 12th, 2020 at 7:34am
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I have a CPA in 222R. On checking case length. The original batch of Bertram brass I bought has been trimmed to 1.688". I checked a batch of new Bertram that has not been fired or trimmed, it between 1.783-1.793".
Bob
  

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Packet
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Re: 222 rimmed - cartridge length dilemma
Reply #2 - Jan 12th, 2020 at 9:13am
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As listed in Cartridges of the World, .222 Remington rimmed, case length is 1.7", cartridge length is 2.130"
  
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n.r.davis
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Re: 222 rimmed - cartridge length dilemma
Reply #3 - Jan 13th, 2020 at 9:05am
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Looked at the SAAMI site, they didn't list it but there is a wealth of information there!  David
  
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CharleHunter
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Re: 222 rimmed - cartridge length dilemma
Reply #4 - Jan 14th, 2020 at 4:56pm
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You could always take a 5.6 x 50R case, size and trim to the length required for your chamber. It would also work with a .357 Maximum case resized accordingly as well, although you may need to neck turn to correct the neck wall thickness.
  
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JLouis
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Re: 222 rimmed - cartridge length dilemma
Reply #5 - Jan 14th, 2020 at 6:40pm
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The case is being headspaced off the rim and not the shoulder myself I would just try shooting it as is. Have you made a chamber cast to verify the cut chamber length by chance.
  
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JLouis
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Re: 222 rimmed - cartridge length dilemma
Reply #6 - Jan 14th, 2020 at 6:44pm
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The case is being headspaced off the rim and not the shoulder myself I would just try shooting it as is. Have you made a chamber cast to verify the cut chamber length by chance. The only other option would be to set the barrel back have a custom reamer ground and re-chamber it. When done put the reamer up for sale here and recoup as much as you can.
  
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1isenough
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Re: 222 rimmed - cartridge length dilemma
Reply #7 - Jan 14th, 2020 at 10:42pm
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I am still looking for answers on the correct length of the 222 rimmed.

Yes, I cast the chamber and it is exactly 1.85.  I got a 222 Rem Mag cartridge and it is perfectly head spaced to the block, so I can shoot it.  Problem is, no rimless extractor.  I could shoot it and manually extract with a pick of some kind, but not hat I wanted.
  
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1isenough
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Re: 222 rimmed - cartridge length dilemma
Reply #8 - Jan 14th, 2020 at 10:48pm
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CharlieHunter

Look at my earlier post just made, regarding the chamber cast.

The 357 Max has a 1.605" cartridge which would be way short for the 1.85" chamber.  Actually, it is even short for a 1.70" chamber, which is what I originally thought the 222 Rimmed was.

The other cartridge you mentioned is pretty unobtainable from what I was able to see in a quick online search.  Thanks for the input.
  
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Dellet
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Re: 222 rimmed - cartridge length dilemma
Reply #9 - Jan 15th, 2020 at 8:44am
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I have brass that I bought as 222 rimmed and measures what you would expect with a 1.700” length. There is no headstamp. It probably is Bertram or Jamison.

Did the reamer you used cut the recess for the rim?

I isnit possible you were sent a regular 222 magnum reamer?


  
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1isenough
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Re: 222 rimmed - cartridge length dilemma
Reply #10 - Jan 15th, 2020 at 7:00pm
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Dellet,

The chamber reamer cut a correct diameter rim and the total length, which includes the rim, is 1.85. 

I just found a thread from accuratereloading.com, from 2002, that says you can use the 222 Remington FL dies for the 222R.  Obviously that only works if the rimmed cartridge is 1.70".

Next I found a thread from Saubier.com in 2013 in which a contributor said the spec chamber length for the 222 rimmed is 1.85".

Other than one reference above to info in Cartridges of the World suggesting a 1.70" cartridge length, not much definitive info is in the responses so far.  I asked PTG what the overall cartridge length was on their 222R reamer, but no reply yet.  I hope more facts emerge on this question - I really need to know.  Thanks for taking the time.
  
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JLouis
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Re: 222 rimmed - cartridge length dilemma
Reply #11 - Jan 15th, 2020 at 8:53pm
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The trim to length coming from quite a few sources for the 222 is 1.690. So there is something that just can't be right with the rented reamer you used. If it were me I would set it back and use a 222 reamer and then cut the rim recess using a boring bar.
« Last Edit: Jan 16th, 2020 at 1:04pm by JLouis »  
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Dellet
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Re: 222 rimmed - cartridge length dilemma
Reply #12 - Jan 15th, 2020 at 9:58pm
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Most of these rimmed cartridges were developed as a work around for European laws that do not allow firearms chambered for military cartridges. 307 Winchester is another example.

CIP, lists a 222 rimmed Stief. Case length is 43.1 mm or 1.700”
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CIP website similar to SAAMI
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Since the 222 rimmed is not a SAAMI cartridge the reamer was cut to customer specs. Sounds like someone ordered a 222 magnum rimmed. Hopefully PTG will sort it out.

Interestingly enough reamerrentals.com lists a 222 rimmed reamer and when you look at the schematic linked, the print is for a 222 magnum, made by PTG. It is not a rimmed version.
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I would have some questions for the folks that rented that provided the reamer.
« Last Edit: Jan 16th, 2020 at 12:52am by Dellet »  
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CharleHunter
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Re: 222 rimmed - cartridge length dilemma
Reply #13 - Jan 16th, 2020 at 5:38am
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Went through the ammo collection and found these, manufactured in 1977. I find it somewhat amusing that they make a big deal of being single flash hole. Not really sure where you would ever find Berdan Primed Twin flash hole 222R!
  
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CharleHunter
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Re: 222 rimmed - cartridge length dilemma
Reply #14 - Jan 16th, 2020 at 5:39am
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Couple more pics
  
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