What is the most powerful 25 caliber air rifle?

Answer 1

The most powerful .25 Cal would fall into the PCP (PreCharged Pneumatic) class of air rifles like the Marauder or Condor 25 cal. PCP's require a special compressor, Hand Pump or Scuba tank to charge them to 3,000 PSI. To give you an example a C02 Powerlett holds only 800 PSI.

However there are even more air rifles that are larger calibers like the Sam Yang 50 caliber that are also PCP class air rifles.

Some of the air gun companies are starting to make less powerful .25 caliber "Springer" air rifles like the Hatsan model 95 SAS that is very well made and cost around $150. PCP class air rifles usually cost around $300 and up, PLUS the charging system that can add another $100 to $300 to the final price.