Hello, I own a Beamont air rifle in .308. It shoots 158 grain molded lead conical bullets. Very accurate. Power is around 500fps.
For range shooting best to hook a large tank with an external regulator. Although it is not internally regulated it produces 3 consistent shots between 230 and 180 BAR on the internal tank.
If properly moderated no hearing protection is needed.
Large game (mostly Wild Boar) can be taken with headshots.
Hand made, very expensive, but quality wise one of the best “big boor” air rifles.
Cheers, Hans