I haven't, but based on the picture, looks like a long bullet that will require a pretty fast twist to stabilize.
Without knowing what kind of rifle you are shooting and rate of twist, it's hard to say if these might work.
I've shot a lot of conicals and PRBs. I can say this...unless you are hunting grizzly or other very large and dangerous game, there is not much need for a 580 gr bullet.
That said, look for the post on the hog killed with a "No Excuses" conical. Now THAT'S a hole!!!