Which is best powerfull 22 pellet rifle gun?

If you are looking for the high end of air Rifles then look into the PCP class of air rifles (PreCharged Pneumatic) these air rifles are used in the Olympic games and in serious hunting. PCP rifles are expensive but you get the very in air rifles. They not only come in .177 caliber but also come in .20, .22, .25 9MM, 357 Cal, 45 Cal and 50 caliber pellets. They require a special air pump, Or Hand pump or Scuba tank to charge them to 3000 PSI. This is far beyond the common air rifle. They will cost you allot, in the range of $300 to $3,000. Benjamen currently has a starter PCP rifle called the Discovery. If you are looking for raw power then the Shinsung Dragon slayer fires a 50 caliber slug that is capable of bringing down a deer or moose, it cost $550. If you want a top end Match rifle then the Feinwerkbau 700 Aluminum Blue will cost you $3.395. Benjamin currently has an Excellent PCP rifle called the Marauder ($500) that comes in .177, .22 and .25 caliber. I also suggest the Airforce Condor. With it you have a choice of 12 different barrels to select from. The whole rifle, with Accessories, will set you back around $1,000