cocking effort - avoid any gun that is a "Magnum". That just means a heavier spring, more cocking effort. I'm not a Field Target shooter, but I believe most competitions will limit you to 20 foot pound in the US for any class and 12 fpe in International / European competitions. Heavier guns destroy targets.
Sometimes, less is more. In my own paltry springer experience, most of the time, power is inversely tied to accuracy. the Magnum guns have so much vibration that accurate shooting is extremely difficult, where lower powered springers don't vibrate nearly as much, making accurate shooting easier.
That's why PCP's are so much easier to shoot. No piston vibrating the gun, just a valve opening and letting air through.
The problem with PCP's is the support system you must have. Pumps, tanks, access to High Pressure Air, and the rest. Advantage to Springers on the support system. Just need the gun and pellets