Winchester barrels were typically very good quality back in the post war thru late 50s period from what I gather. The hit or miss accuracy, From what I understand, was when the featherweights first appeared. They were alleged to be free floated from the factory but in reality some were not floated quite enough and hence even though the barrels were good, accuracy could be erratic unless you truly floated them and bedded the recievers. The standards on the other hand, had the forend screw that threaded into the bottom of the barrel. In alot of cases you could play with the forend screw to improve the rifles groups. I have a 1952 standard grade 270, but I haven't tried this yet. It seems to shoot pretty decent as is.Interesting. It really doesn't look like doing it on the cheap was a priority when building this gun. Very fancy walnut. Perhaps the owner had a Model 70 that got damaged and he just wanted to save the barrel. I seem to recall the pre 64 Model 70 had a reputation for hit and miss re accuracy. I presume the issue was the barrels?