Well I have 3 British and no other Euro calibres. The one I use the most is the 303Brit-in an American rifle, Ruger No1- then the 375H&H -in an American rifle-Rem700 and a 416 Rigby, in a European rifle, CZ550.

I use the 303 the most but have only used it on mice to pigs, the 375H&H the same the 416 Rigby on Rabbits/feral cats to Elephant.