Hmm...all the ones that I've shot would beg to differ. The VG is a very tough bullet with regard to spin. The really low density of the core probably has a lot to do with that. Now a 35gn bullet designed for the Hornet is a totally different story.
As far as dis-similar metals and shifting with relation to each other, look at a bonded bullet. It isn't shifting at all and you aren't spinning one apart.
Bookmarks