has a much thicker rim than normal, between .075 to .085 whereas the standard accepted rim thickness is around.055, so that extra rim thickness has to be dealt with somehow.
![[image]](images/uploaded/20250113203836678579cc8152d.jpg)
![[image]](images/uploaded/20250113203854678579de926c0.jpg)
I don't have a 45 AR reamer as I don't remember ever having anyone ask for the 45 AR rechamber in the 45 ACP cylinder. If it was a new cylinder and we had the 45 AR reamer there would be no problem. I guess if I could find a 45 AR reamer we could remove that extra .030 to make room for the 45 AR cartridge headspace. But I don't think that afterward the 45 ACP would work in that situation. I may be wrong there as I don't remember having that situation crop up.
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Auto Rim in a 45 ACP Blackhawk
- Stan George, 2025-01-13, 13:28
![[*]](themes/default/images/complete_thread.png "Open whole thread")
- 45 Auto Rim in 45 ACP Ruger Cylinder - Rgates, 2025-01-13, 14:47
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Stan,that might pose a problem. The 45 Auto Rim
- Gary Reeder, 2025-01-13, 13:46
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ACR and ACP
- Stan George, 2025-01-13, 14:21
- Stan, I get it, a few thousanths more of the case web - WB, 2025-01-13, 14:37
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ACR and ACP
- Stan George, 2025-01-13, 14:21