My Ruger # 1 22" is a early one with a very long throat. It shoots well though. I can load 50gr of H 4350 with 140 gr bullets for 2855 FPS. 175 gr Hornady 48 gr RL 22 around 2575 FPS.
I loaded the 160 gr NP pretty hot with H 414 and was surprised at the speed and low pressures.
It shoots the better loads around 1.5" @ 100 yards 3 shot groups. with limited testing, it was a lot easier to develop loads with the # 1 Ruger in 7X57 than my LH Ruger 7-08 Hawkeye!
