Dear Gentlemen, A CZ550 in .458 Lott is coming my way with a 20 inch barrel. Could anybody tell me what velocity I can expect to acheive with a .458 Lott CZ550 with a 20 inch barrel ? 500gr bullets are to be used. Will it achieve 2150 fps ? As I understand this is the minimum for dangerous game. Please advise me if I am wrong. Also does anybody have experience using this round with a barrel of this length ? All advice appreciated. Regards Craig.