Yup.
Sierra only recently offered those match 8mm bullets on the U.S. market.
However, they've been sold overseas for quite some time. Sierra also has a factory store at the plant, and sells factory "second" bullets. I stopped in and bought a bunch of the 8mm MatchKings years ago. I weight-sorted them, and used them to good effect in my 8mm FN-49 when it was my autorifle for non-sanctioned High Power matches.
I ran XMR-4350 behind the heavyweight MatchKings. Didn't give up anything to the folks shooting .30-06 or .308!