Are they hand pumped, cylinder or compressed air? Not wise acre response just curious. I know they sell some very powerful ones that use compressed air.
No more pumping! Most now are what is called ‘break barrel’ which means the barrel breaks open at a hinge and is pressed forward until the gas piston is fully charged, a pellet is inserted and the barrel is closed back up.
I guess you could say they are pumped once, but the best of them use a gas piston, not a spring piston which is older tech.
With just one cocking they will drive a 22cal 14.5 grain pellet out of the barrel at 800-950 fps. A 18.3 grain pellet is a little slower but hits like a hammer.
You can get them in 177cal, 22cal, or 25cal. I would suggest 22cal which uses pellets you can buy everywhere and is more powerful than the 177cal.
“Are they hand pumped, cylinder or compressed air?”
You can get them that use a compressed air cylinder that you have to take off and have filled with special equipment but those sound like a PITA to use.
The barrel breaker is newer tech, cheap and powerful.
If you were looking for raw power in a 22cal break-barrel air rifle the Ruger air Magnum combo looks interesting.
https://www.pyramydair.com/s/m/Ruger_Air_Magnum_Combo/2354#5372