@SStomcat
I only commented as you mention "A Black Powder express not any more good than just having some fun at the range".
With a 650gr .585 solid (Kinda pre expanded compared to smaller rounds) at 1850 I would say it is buffalo capable out to say 60 yards. Most folks don't think about a giraffe's true size, plus the bones are as big and even denser than a buffs. not to mention that the skin is even thicker. (they just don't have the attitude of buffalo) But the hunter with the 577 BPE would need to take shots like say a 9.3 or 375. Perfect broadside shots and be willing to walk away from less than optimum presentations on buffalo. WOULD NOT use a bpe on elephant, rhino, or hippo on land.
My problem is I love hunting DG with a double. all of my DG has been taken with one of my doubles.
450NE, 500/416, 450/400, and 9.3x74. With the exception of my leopard.
I Backed a buddy up on his elephant with a 500 Jeff bolt gun as the only exception.