I bought my 77V in 220 Swift in about 1980. I was hunting for one at gunshows and finally found one. The barrel had been shortened to 20”, which was fine with me. I was planning to use it while guiding guests on the company lease in south Texas, so short was good. A gun book I had suggested that the 55 gr Nosler SBBT over 38.5 gr of IMR 4064 was the way to go. I worked up to that, found it to be super accurate, and use that load to this day. Now on the second barrel.