The guy could save himself a lot of work and buy 5 Kimbers...

Five Total;
.22 Long Rifle
.223 Remington
.30-06
.375 H&H
12 Gauge

Five Centerfires;
.223 Remington
.243,.257 Roberts,.260, 6.5x55 or .270 [I really want a .260]
.30-06
.338 Win
.375 H&H