Ruger 77/22

It depends on the model the rimfires have a barrel that is held on with a retaining block and can be changed similarly to a 10/22. I heard that the new 77/22 have threaded on barrels but I could be wrong. All 77/22 Hornets have threaded on barrels so you will have to go through the same process as a normal centrefire rifle.
 
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