To be honest, I'd never heard of it. After reading a bit, I'd say it falls into the "eargeschplitten loudenboomer" class of weapons, suitable for hunting buses and trucks... If I were ever to fire one, it would involve a tree, some stout strapping, and a long piece of string. Call me a wimp, but .338 Mag is as far as I go.
"Valor needs first strength, then a weapon."
-- J. R. R. Tolkien (1892-1973)
"Free men have arms; slaves do not."
-- William Blackstone (1723-1780)