Thread: .22 WRF
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Old March 5, 2013, 09:18 PM   #8
James K
Join Date: March 17, 1999
Posts: 21,808
I have not checked with CCI, but I suspect the warning against use in older guns and revolvers is due to the fact that the barrels of those guns were made from the same soft steel used in most .22 rimfire barrels, where barrels for the .22 WMR are made of harder steel made to stand up to the wear created by jacketed bullets.

Jim K
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