There is no single (Most powerful ) pcp air rifle. It comes down to your definition of power. Do you mean speed or knock-down power.
Light pellets fly faster. But heavier pellets fly straighter and have harder hitting and knock down power. So any PCP that fires a .177 caliber pellet can select a variety of pellets that fit the users needs.
I own 4 different PCP air guns. All of them take a charge of 3000 PSI all 4 of them have a different use and fill a different need when shooting. The most powerful small-bore rifle is Air Force Condor.
It is able to achieve high velocity even with heavy pellets like Beeman Kodiaks and Eun Jins.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.