I've had a M-63 in the 4" and 5" versions. Just got the 3" version a few weeks ago and love it.
The 3" is quite variable on accuracy with various loads (As are most .22's) Worst would be in the 4-plus inch range for 8 shots (a full cylinder) to a great 1 3/4" 8-shot group with CCI subsonic fired benched at 25 yds.
As a side note, the DA trigger on this gun came as a tad on the heavy side. I clipped 2 coils off to reduce the pull, using a Dremel cutting wheel. Well, I didn't realize I had inadvertantly cut half way through a 3rd coil, so I had to take it down to "Minus 3" and hope for the best. Greatly improved the DA pull - and works 100%. Whew!
To the point - if I had a choice of a 4" 617 and a M-63 in and barrel length... as much as I like my 63 I'd choose the 617 10-shot. A friend of mine has one - I've shot it, and as an "All around" gun for many tasks It'd be my pick.
The 3" is quite variable on accuracy with various loads (As are most .22's) Worst would be in the 4-plus inch range for 8 shots (a full cylinder) to a great 1 3/4" 8-shot group with CCI subsonic fired benched at 25 yds.
As a side note, the DA trigger on this gun came as a tad on the heavy side. I clipped 2 coils off to reduce the pull, using a Dremel cutting wheel. Well, I didn't realize I had inadvertantly cut half way through a 3rd coil, so I had to take it down to "Minus 3" and hope for the best. Greatly improved the DA pull - and works 100%. Whew!
To the point - if I had a choice of a 4" 617 and a M-63 in and barrel length... as much as I like my 63 I'd choose the 617 10-shot. A friend of mine has one - I've shot it, and as an "All around" gun for many tasks It'd be my pick.
