I have the honor of reloading for a Pre-64 Winchester Supergrade in 220 Swift. The gun was inherited by a good son who knows this gun is special. However, he is determined to shoot it and hunt with it. Good for him. He will trade me a Mdl. 19 4" for my troubles.
I want to use 55gr. Nosler BT's, because I live near Nosler and I like to use their bullets. I also want to use Reloader 15 because I have some fresh, unopened. I also don't want to hurt this gun in any way. Mellow, accurate, somewhere below fission.
Any of my fellow handle pullers have any experience with the above circumstances, or any thing reasonably close to the subject? Well, then, any good stories at all?