My trusty cricket just let me down

What scope do you have?

Don't feel too bad Wyshadow. I just watched Jim Shockey shoot over a sheep in Russia by 10' at 200 yds. Probably a $40,000 trip. His top turret adjuster had come off and he was twisting everything in the wrong direction.
JK

To be a foot off at 50......that is alot and I feel your pain. I would check scope mounts first. Doubtful its your scope....but worth checking. I'm curious for you to chronograph it since it was low. Maybe a regulator issue.

I had the same thing a couple of weeks ago with my Cricket 25. It has been very accurate for me but then I started noticing the that the poi seemed low at 50-60 yards. It was also around a ft down.

Anyway, to make a short story shorter, The valve stem was starting to break. My first thought was that the power adjuster had come loose so I tried increasing th hammer spring tension. Then the valve stem snapped completely and it wouldn't fire at all. I got a new Titanium one from Ernest Teresa Gandi and it's back to being the accurate powerhouse I know and love. 

Cricket's have awesome accuracy and feel great to shoulder but they have some horribly brittle internal parts. The indexing pin, the plastic power adjuster and the valve stem have all given me problems in just 9 months. They've all been replaced with stronger ones so hopefully my Cricket should be a little more robust now. 

I had a very similar problem with my .22 cricket. It was an absolute laser for the first two tins after I got it, but all of a sudden for no reason it starts to wander all over the olace !! What in the world??? After much painful searching and many agonizing sessions of trying different pellets and scrubbing the barrel and Chrono-graphing, my brother-in-law who is a gun smith but not a pcp expert discovered two of my scope ring screws had slowly worked loose!!
He torqued them down with a special scope mounting torque screw driver and my trusty cricket has been blazing away at sub-half inch at fifty ever since. (Except if its windy of course )

This was 7000 some rounds ago with not a single problem ever since.

Bummer to hear that Crickets use cheap internal components. I'm still thinking of adding a .22 or .25 PCP bull pup at some point, but it'll probably be a Taipan Mutant. 

I dont think expensive PCP airguns should be delicate. 

Wyshadow, so it wasn't getting all the air behind the pellet, probably the same effect as a broken internal breach O-ring. That's definitely better than a broke valve poppet.
Jimmy

I got a complete set of Cricket O rings off an eBay seller. They came from the UK but they arrived fairly quickly. It was a painless buying experience. Not exactly cheap if you just want one O ring but I figured that it can't hurt to have a complete set in stock as every one of them will need replacing eventually.