I voted "617". I shoot a M-18 in rimfire revolver competition. People with the 617 always eat my lunch. Not saying its more accurate then the Model 18.
Its the loading, 10 shots vs. 6. Plus the speed loaders for the 617 work better the my speed loaders for the Model 18.
Not going to get rid of my M-18 by a long shot, but the 617 is on my "short-to buy list".
CPT USAR Ret
USAMU Sniper School Oct '78
Distinguished Rifle Badge 1071