The last box of factory Winchester 140-grain .264 softpoint ammo I bought, maybe 4-5 years ago for an article, still had the two-diameter bullet. I read somewhere that the original Remington 140-grain .264 bullet was also 2-diameter, but have never used any myself.

“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.”
John Steinbeck