I don't know about anyone else but I had never heard about this until today. I was watching the host of "Under Wild Skies" take a Cape Buff with a 577 and thought what are the spec's for that? For those that are interested here is what I found:
It is really a 585
It maxed out at 11300 POUNDS OF ENERGY with 198 grains of VVN 560
velocity of only 2608
Bullet length is 3.710
Fed 215 primers
750 navel ordinance (don't know if this is monolithic)
You think it has some recoil ?[:-]