You might find this helpful. I use a 45-70 or a 458 Win. Mag. Case when measuring for my TC Gray Hawk .50 cal. sidelock measuring BP or Pyrodex and it works out very well. Cheap assessable powder measures.
Sorry I copied it as a vertical list but when pasted here it ran together. Still readable though just not as easy. But saves space.
Rifle Cartridge Case Capacities
Compiled By Chuck Hawks
The following capacities are based on the approximate weight of plain water measured in grains and were acquired from various sources. The brand of case measured is in parenthesis ( ) as follows: F C = Federal, Hor = Hornady, N = Norma, R-P = Remington, Wby = Weatherby, W-W = Winchester.
For a more comprehensive list covering additional cartridges see the Expanded Rifle Case Capacity List.
.223 Rem: 31.4 grains.22-250 Remington (W-W): 44.6 grains.223 WSSM (W-W): 55.0 grains.243 Winchester (W-W): 52.8 grains.243 WSSM (W-W): 53.0 grains6mm Remington (R-P): 54.6 grains.240 Weatherby (Wby.): 63.1 grains.25-06 Remington (W-W): 65.0 grains.257 Weatherby Mag. (Wby): 85.6 grains6.5x55 Swede (N): 55.0 grains.264 Winchester Magnum (R-P): 81.5 grains.270 Winchester (F C): 67.4 grains.270 WSM (W-W): 78.9 grains.270 Weatherby Mag. (Wby): 85.3 grains7mm-08 Remington (R-P): 52.2 grains7x57 Mauser (W-W): 55.6 grains.280 Remington (R-P): 68.6 grains7mm WSM (W-W): 83.0 grains7mm Remington Mag. (W-W): 83.2 grains7mm Weatherby Mag. (Wby): 87.5 grains.308 Winchester (W-W): 53.5 grains.30-06 Springfield (R-P): 68.0 grains.300 WSM (W-W): 79.0 grains.300 Winchester Mag. (W-W): 90.4 grains.300 Weatherby Mag. (Wby): 100.4 grains8x57JS Mauser (W-W): 62.7 grains.338 Winchester Mag. (W-W): 85.6 grains.340 Weatherby Mag. (Wby): 102.1 grains.35 Whelen (R-P): 72.6 grains.350 Remington Mag. (R-P): 73.7 grains.375 H&H Magnum (N): 96.4 grains.416 Rigby (F C): 132.6 grains.444 Marlin (R-P): 69.5 grains.45-70 Government (F C): 75.5 grains.458 Winchester Mag. (W-W): 93.3 grains.460 Weatherby Mag. (Wby): 144.7 grains
