The Barnes originals in 350 gr. that I played with in my ZKK 602 - produced some 2,420fps, just as Elmer said they would, using IMR4350 powder. I played with them many years ago when living in Smithers - & I recall they had the .049" jackets, not the .032".
I can't recall ever shooting anything with them other than a couple coyotes & paper targets. They grouped just under 2" for me.