Pat here, new to the forum, but happy to find it. I had two lemons to report. The most disappointing was/is a RWS 460 Magnum 22 cal. Plenty of power for a springer at about 24 FPE, but it won't hold a group no matter what kind of pellet I put through it. Looking to sell it on craigslist to some sucker who isn't on this forum. The other was a Gamo Whisper - my first foray into 'adult precision air rifles'. It held a fairly good group for a fairly inexpensive air rifle but you could pull the trigger so hard your finger would hurt before it would fire. Also paid a little extra for the gas ram, and it was so inconsistent that the FPS over the chrony would vary up to 300 and 400 FPS between shots.
Have since graduated to Weihrauch, Air Arms and Feinwerkbau. Very happy with all three. Of the three the Feinwerkbau is the most accurate, but it is pellet fussy - get the best group with H&N Field Targets. The least pellet fussy is the Air Arms TX200 - shoots a fairly wide range of pellets very accurately. (Your get what you pay for).