What is the most inaccurate .22 RF you have owned? What was the story? For me it was (and remains) my Remington Nylon 66 which groups about 18 inches at 50 yards from a bench, scoped or not. I bought it new back in the early 1970s. Back then it misfired every 2 or 3rd round with weak, very faint, firing pin strikes, so it went into a closet and I got something else (equally horrible and soon sold) until I got a round tuit. Many years (i.e., decades), much knowledge and significant tool acquisition later, I found a round tuit and returned to the 66 and diagnosed the problem as a manufacturing defect inside the bolt firing pin arrangement, unbent and removed the pointy little pins holding the cheap stampings together, and widened the breech side of the firing pin slot length a little less than a 1/16 of an inch. Reassembly and testing showed the gun now was infallible and 100% reliable with any ammo, even mixed brands and types. For the first time in over 30 years accuracy testing was now possible. Can't begin to express my dismay at the 50 yard 18" group results. Words fail. The bore is clean and the crown is normal. Back in the safe it went and sits while I ponder. Makes me wonder about the whole Tom Frye thing.