Alex Dear... It Should Be Marked On The Side Of The Barrel. You'll Need To Know For Future Reference When You Need To Buy More Ammo
For The Most Part, Rifles Are Calibers Like .22lr Or .22s Or .22 S-l-lr (in This Ase The Letters Demonate Casing Size... .22 Is A Rimfire Cartridge Available In S= Short, L= Long, Or Lr= Long Rifle They Also Make A .22magnum Ya Kinda Need To Know For Sure To Get The Right Ammunition
Shot Guns Are Predominately Measured In "gauge" Sizes/// Ie, 28ga, 20ga, 16ga, 12 Ga.. The Lowwer The Number The Bigger The Bang
Some Shotguns Are Chambered For Varying Length Shells As Well. 2 3/4 Inch Is The Old Standard, 3 In Magnum And 3 1/2 In Magnum Are Other Possibilities--- Something Interesting The Size Is Indicative Of How Many Exact Fit Brass Balls It Takes To Add 1 Pound Of Weight... So A 12 Gauge Takes 12 Brass Balls That Fit Inside The Barrel Exactly To Add 1 Lb Of Weight.. The Only Exception To This Is The .410 Which Is Actually A Caliber (there's Always 1 In The Bunch) Anyhow Its Internal Measurements Are .410 Inches
Rifles And Pistols Predominately Fire A Single Solid Bullet Where Shotguns Fire A Shot Cup Full Of Many Lead Pellets In A Variety Of Sizes Which After Exiting The Weapon Spread Out In A Circular Pattern Increasing The Area Of Destruction
In Most Weapons Created Since The Mid 1800's The Caliber Or Gauge Size And Chamber Length Is Imprinted Upon The Barrel... In Most Cases The Left Hand Side Of The Barrel Near The Guns Body
Oh That Whole Chicago Thing? Yeah Doesnt Work So Well Since Thats The Town That Made The Tommy Gun Famous When Used By Mobsters During The Prohibition Days... Suffice To Say Chicago Has Gun History