Just finished giving a Spa Day to my old New Haven 251c.
Honestly all of my more experienced 22s seem to be more accurate than my newer 22s like the 10/22 but I primarily have considered that mostly familiarity.Have one just exactly like it. Was my grandads, and it wears a 2.5x steel Weaver. At 40 yards, rested on the patio table, I can put all 15 shots in the space of a dime. Most accurate .22 I've ever held. I sure do love it. If I could ever find a 351K I'd probably give it a new home, too.
Mac