I found this thread which struck a cord as my very first groundhog kill was with a 220 swift. The rifle belonged to a college buddy of mine, a pre-64 model 70
of course but had been purchased by his father when he was a small child in the very southern part of coal country of West Virginia. His dad was a WWII veteran and a coal miner of course.
When my college buddy was a small child his mother had given his dad $200.00 to my some furniture for the house, when his dad returned he had the pre-64 220 swift and no furniture. His mother was spitting mad but his dad kept the rifle. Over the years growing up he said his dad had "sold the 220 swift several times and each time when his mother discovered the rifle gone......she had his dad go buy that rifle back which he did.
The 220 swift left enough impression on me that some years later I bought a Ruger model 77 heavy barrel in 220 swift. That rifle would shoot tiny
bug holes with a Sierra 52 gr and IMR- 4320.
