Not really
68.3lbs is 31kg
31 Kg is 31,000 grams
Some are heavy, some are light. It is a fairly mild cartridge, and does not require a very heavy rifle. Weight will depend on the specific make and model.
An Air Rifle is either a BB rifle or a pellet rifle. It uses air or gas to propel the projectile.
A sporter air rifle and what?
No
The 31kg of rice can be weighed using the 1kg stone a maximum of 31 times. This is because each time the 1kg stone is used, it subtracts 1kg from the total weight until the desired weight is reached.
Are you asking how do you swap and air tank on an air rifle, or swap for and air rifle? In most air rifles you put it on safe and swap out the tank by unscrewing it and replacing it.
can i ship air rifle to trinidad and what i need
When you say Air Rifle you are referring to a pellet rifle not a firearm. At present there are no 300 Cal air rifle being made.
Only if the scope is designed for an air rifle. Because of the recoil being different on an air rifle than a firearms rifle. Air rifle scopes are made differently than firearms scopes. A firearms scope can break it's glass mounts if it is used on an air rifle.
@ 4kilos