your DON'T relax the shoulder. the butt stock is held close (tight) to the shoulder.
In this manner there is less (pain) recoil to the shoulder.
30/06
Uses .277 bullets
Generally speaking, no. You can only fire the caliber for which the gun is chambered. There are some exceptions, but not many.
All of them.
No.
You will have to tell us if you are talking about black powder or center fire.
A .222 is a .22 cal center fire weapon at fires a .222 round
No, a .30 caliber round cannot safely fire in a .30 Carbine rifle. The .30 Carbine cartridge is a specific round designed for that rifle, while other .30 caliber rounds (like .30-06 or .308 Winchester) have different dimensions and pressure characteristics. Attempting to fire an incompatible round can lead to dangerous malfunctions or damage to the firearm. Always use the correct ammunition specified for your firearm.
The Olympic air pistol and air rifle events use a .177 caliber pellet. The biathlon (skiing and shooting) uses a .22 caliber rim fire rifle.
It fires a 7.62x51mm NATO bullet, which is similar to a .308 Winchester.
I Sold mine for 100 dollars
You aren't supposed to dry fire .22 rifles because they are rimfire. If you want to do this, you need to find some .22 dummy rounds.