I wondered if anyone has done this conversion in Australia ?Lother Walther make 577 N.E barrels ,i have a no1 in 375 which i was going to convert to 500 n.e, but i have always wanted a 577 , but $25,000,for a double is too way out for me .If i ever get to Africa for cape buffalo or N.T for water buffalo, i would love to see the effect of a 577 on either.