That is an excellent group! I had bought a 617 some years ago with the hopes of accuracy exceeding my centerfire revolvers but I could never get it to shoot that well. Yours is definitely a shooter!
AzShooter , Paul105 - if my 617 was anywhere close to what you two are shooting I would still have it! Impressive groups! 100 yards - WOW! I may try some 100 yard groups later this year.
Yessir, those 617s are shooters. Below is my best group with my 4" 10-shot 617. I don't have any groups shot from a bench, so this is my best 25 yard offhand (double action) group.