Not that I will ever get my hands on the full set, but,

small rifle;
Mauser bolt in 275 Rigby by John Rigby
not so small rifle;
Mauser bolt in 416 Rigby by Who else? John Rigby
have to have some doubles;
375 flanged Mag. in a H&H Royal dbl.
Westley Richards stopper in .577-3" regulated for
the 650-90 cordite load.

I can dream
Raff