My favorite calling varmints rifle is my old tang safety Ruger 77 in 220 Swift. It is spooky accurate. Over the years it has been my test bed for new scopes. If that rifle won't shoot very tight groups it's the scopes fault. It is currently wearing a Leupold VXI 4X12. For walking and calling that's just about right.

It is the top rifle.
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"The only thing necessary for the triumph of evil is for good men to do nothing."
Edmund Burke 1795

"Give me liberty or give me death"
Patrick Henry 1775