Depends on type of ammo, barrel length, use of a muzzzle brake, etc- but typically 140 to 170 dB. Very loud, and yes, you want to use good hearing protection when shoting it.
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.
What is the price range for a browning patient 300 magnum rifle?
300 i think
yes,many have done that.
what goes father a 300 short mag or a 300 mag
Rifle chambered in one of the cartridges named Winchester Magnum- such as the .300 Winchester Magnum- or .300 Win mag for short.
Not even close.
The term 300 mag usually refers to the .300 Holland and Holland magnum rifle cartridge.
The H&R model 300 Ultra Rifle is a bolt action, repeating rifle. Typically built on a FN or Sako action, but possible other manufacture of actions. Generally considered a good quality rifle.