Common centerfire

http://upload.wikimedia.org/wikipedia/commons/thumb/f/f5/Cartridge_Sample_2.jpg/600px-Cartridge_Sample_2.jpg

From left to right: .17 HM2 , .17 HMR , .22LR , .22 WMR , .17/23 SMc , 5mm/35 SMc , .22 Hornet , .223 Remington , .223 WSSM , .243 Winchester , .243 Winchester Improved (Ackley) , .25-06 Remington , .270 Winchester , .308 , .30-06 , .45-70 , .50-90 Sharps

Inches

http://upload.wikimedia.org/wikipedia/commons/thumb/a/ab/Rifle_cartridge_comparison.jpg/300px-Rifle_cartridge_comparison.jpg

From left to right: .50 BMG , 300 Win Mag , .308 Winchester , 7.62 Soviet , 5.56 NATO , .22LR

Metric

Wildcats - obscure - proprietary

Inches

Metric

Bore

Very large caliber (.50 and larger)

Inches

Metric

See also