Operation Overcast

[lwd]

From: http://www.chuckhawks.com/rifle_case_capacity.htm

.308 Winchester (W-W): 53.5 grains
.30-06 Springfield (R-P): 68.0 grains
...
8x57JS Mauser (W-W): 62.7 grains

This one has slightly different values (note that it also has a slight difference between .308 and 7.62: http://kwk.us/cases.html

7.62 NATO 54
.308 Win 56
....
.30-06 U.S. 69
...
7.65 Mauser 58
...
8x57(R) Mauser 62

For Comparison Wiki at: http://en.wikipedia.org/wiki/.303_British
Lists the .303 British capacity as 55.7
there cartridge index is at: http://en.wikipedia.org/wiki/List_of_rifle_cartridges

Dimensions for the .308 along with a drawing: http://www.6mmbr.com/cartridgediagrams.html#308Win
Same for the 30-06: http://www.6mmbr.com/cartridgediagrams.html#3006