A Marauder is near the low end of prices for a PCP. I jacked up my R5M hammer spring and pressure one time for more power. So much so that it wouldn't cycle easily. A coon came buy I tried to chamber a pellet and it got jammed. Pulled out the Marauder that haven't shot for more than 6 months. Coon DRT due to lead poisoning of the brain. The pellet was right on target!
On the Marauder you should be careful not to bang the barrel on anything or it may upset the zero. The R5M is a tank with its tensioned barrel you can run it over with a truck.
BTW decades ago I bought a Ruger 10/22 for less than $100. It shot so poorly with (cheap ammo) Winchester Wildcats. The groups at 50 yards were about 1.5" and it also jammed some times. I was so disappointed I sold it to a co-worker for only $50. He said it work great with CCI stingers. I wasn't interested in a gun that had to shoot premium ammo to decently function.
A Marauder shoots way more accurately with low cost ammo than a 10/22, and the cost that isn't that much more!