Musgrave was having trouble when they were converting their barrel making machinery to button rifling. The late CP Donnelly went to SA and reviewed their process and equipment. Following that their barrels were second to none. I'm not sure when your rifle would have been made. When CP went over there in the mid-80s Musgrave had started making their own actions. But in any event, you have a great rifle.
Greetings all! I've been a hunter for 50 years, but only now planning a trip to Africa. I was fortunate and successfully bid on a couple hunts for plains game in SA later this year and next. Also a rare Native Texas (5th generation) and USMC Vet. Hunt safe y'all!