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Very Hot Topic (More than 25 Replies) Making more .32 long and extra long rimfire cases (Read 2770 times)
ndnchf
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Making more .32 long and extra long rimfire cases
Mar 27th, 2023 at 7:34pm
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Since I picked up a couple more rolling blocks in .32 long and .32XL rimfire, I needed to make some more reloadable cases for them. So over the last couple days I made about 40 more.  I took a few photos along they way. 

For the .32XL I started with .25-20SS brass that had split necks. For the .32 longs I had some new .32 Colt brass.

  
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ndnchf
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Re: Making more .32 long and extra long rimfire cases
Reply #1 - Mar 27th, 2023 at 7:38pm
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More photos.
  
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RJ-35-40
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Re: Making more .32 long and extra long rimfire cases
Reply #2 - Mar 29th, 2023 at 4:23am
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Well done...
  
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Joe Do...
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Re: Making more .32 long and extra long rimfire cases
Reply #3 - Mar 29th, 2023 at 11:57am
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Great photos in your step-by-step process. 
Nicely done !
  
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uscra112
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Re: Making more .32 long and extra long rimfire cases
Reply #4 - Mar 29th, 2023 at 12:03pm
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Do your acorn blanks stay in place with the hole reamed .224"?  I reamed a couple of my .25 Stevens conversions to .224, and even the Umarex blanks fall out if I so much as look at them crosseyed.
  
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Sure shot
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Re: Making more .32 long and extra long rimfire cases
Reply #5 - Mar 29th, 2023 at 12:14pm
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To me it looks like you could put a .22 liner in your barrel, and the .32 rimfire breech block would fire the .22 cartridge just fine without doing anything to it.
  
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uscra112
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Re: Making more .32 long and extra long rimfire cases
Reply #6 - Mar 29th, 2023 at 1:56pm
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Sure shot wrote on Mar 29th, 2023 at 12:14pm:
To me it looks like you could put a .22 liner in your barrel, and the .32 rimfire breech block would fire the .22 cartridge just fine without doing anything to it.


Where's the fun in that?

Reminds me to report that I bored a .32 Colt case on center for a 6mm acorn blank a few days ago. My #4 fires it just fine.  No more need to make adaptors with the hole offset.  Mind you, the rim recess I cut left the blank's rim about .010 proud, but by the same token I did not notch the rim the way most folks do when making the offset-hole adaptors.  If this became an issue, beveling the firing pin tip would take care of it.  

By extrapolation, of course, the unmodified breechblock would handle a barrel linered to .22 LR.  Up to now I would have said it wouldn't.  The secret,if there is one, is the large diameter of the #4's firing pin tip.  

« Last Edit: Mar 29th, 2023 at 2:17pm by uscra112 »  
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Sure shot
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Re: Making more .32 long and extra long rimfire cases
Reply #7 - Mar 29th, 2023 at 3:39pm
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I guess my thought was that if the bore was poor a person could line it to .22 rimfire and not have to modify the breech block’s firing pin position. I certainly wouldn’t want anyone to line a .32 rimfire with a good bore to .22 rimfire.
  
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ndnchf
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Re: Making more .32 long and extra long rimfire cases
Reply #8 - Mar 29th, 2023 at 8:50pm
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uscra112 wrote on Mar 29th, 2023 at 12:03pm:
Do your acorn blanks stay in place with the hole reamed .224"?  I reamed a couple of my .25 Stevens conversions to .224, and even the Umarex blanks fall out if I so much as look at them crosseyed.


Yes, they are a tight press fit. I made a soecial flat anvil for seating them in a loading press.
  
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ndnchf
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Re: Making more .32 long and extra long rimfire cases
Reply #9 - Mar 29th, 2023 at 8:52pm
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Sure shot wrote on Mar 29th, 2023 at 12:14pm:
To me it looks like you could put a .22 liner in your barrel, and the .32 rimfire breech block would fire the .22 cartridge just fine without doing anything to it.


That would't be any fun. I have several .22s, and enjoy the challenge of getting the old rimfires shooting again.
  
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ndnchf
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Re: Making more .32 long and extra long rimfire cases
Reply #10 - Mar 29th, 2023 at 8:58pm
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Regarding the firing pin relief cut. The rim is about .050" thick. I cut the relief .025" down, about half the rim thickness. The acorn blanks seat flush.
  
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ndnchf
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Re: Making more .32 long and extra long rimfire cases
Reply #11 - Mar 29th, 2023 at 9:04pm
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I went to the range today to chrono identical .32 XL rimfire and centerfire loads. I was curious about the velocity difference between small pistol and acorn blank primers using the same load - 9.5gr of Roader 7 and the Accurate 31-090S bullet. Check it out:

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uscra112
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Re: Making more .32 long and extra long rimfire cases
Reply #12 - Mar 29th, 2023 at 9:31pm
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Less difference than I would have expected, and the consistency using RL-7 is another surprise to me.  Thanks!

Remind me - how much RL-7 are you loading in the regular Long Colt case?
  
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ndnchf
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Re: Making more .32 long and extra long rimfire cases
Reply #13 - Mar 30th, 2023 at 5:00am
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uscra112 wrote on Mar 29th, 2023 at 9:31pm:
Remind me - how much RL-7 are you loading in the regular Long Colt case?


In m .32 LC that are trimmed to .775", I put 7.0gr of RL7. 4.5gr of 2400 is also a good load. These are used in a centerfire converted #4 RB.   These same loads are used in the rimfire version. 

My .32XL cases are 1.085" to take the Accurate 31-090S bullet. If the Ideal 299153 bullet is to be used, then 1.150 long cases are used.
« Last Edit: Mar 30th, 2023 at 7:03am by ndnchf »  
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uscra112
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Re: Making more .32 long and extra long rimfire cases
Reply #14 - Mar 30th, 2023 at 7:25am
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Thanks.
  
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