So....while pondering the advantages of the 30 Nosler over longer cartridges with the same capacity I've come across some confusing (for me anyway) load data. Considering their nearly identical capacity I find, that in the new Nosler reloading guide the max load for 300 Wby is substantially higher than 30 Nosler, usually for very similar velocity. For example with 200 grain bullets max load of RL-25 in the Wby is 85 grains for 3008 fps while max load for the Nosler is 78 grains for 3012 fps. I understand the claims for more efficiency in the shorter fatter cartridge but 7 grains difference in practically identical case capacity seems extreme to me. Some enlightenment would be much appreciated.