I think EW should really think about all the variety out there! Feel free to add to this list
Small Game
.22cal (Air Rifle)
.25cal (Air Rifle)
.32 (Blackpowder)
.17HMR
.22Mag
.220 Swift
.204 Ruger
.222 Swift
.17 Mach IV
Mid-Size/Big Game
.50cal (Air Rifle
.260 Remington
.280AI
25-06
.30-40 Krag
.458 SOCOM
6.5PRC
6mm Arc
6.5 Grendel
6.8 Western
7x57
7.5x55mm Swiss
7.7×58 Arisaka
.264 Winchester Magnum
7mm-08
.280 Ross
7mm PRC
.360 Buckhammer
8mm/8x57
8.6 Blk
.338 Federal/WM
.340 Weatherby
.444 Marlin
500S&W
28 Nosler
33 Nosler
35 Whelan
35 Rem
.54cal (Blackpowder)
.30-378 Weatherby
Dangerous Game
.348 Winchester
.358 Winchester
8 Bore Cartridge (Blackpowder)
.50 Alaskan
50-110
.50-140 Sharps
.475 Turnbull
.58 (Blackpowder)
.72cal (Blackpowder)
8x68S
9.3x62
10.3x68
.378 Weatherby
.405Win
.416 Rigby/Weatherby
.376 Steyr
.425WR
.318WR
.458LOTT
.404 Jeffery
.505 Gibbs
.460 Weatherby
.585 Gehringer
.585 Nyati
.577 Tyranosaur
.600 Overkill
.404 Rimless NE
577NE
500NE
600NE
700NE
Shotguns and Pistols
.475 Linebaugh
.460S&W
.357 Maximum
.375JDJ
.45ACP
50AE
12 and 20ga Rifled Slug
12ga (Muzzleloader)
28ga