Well, to continue poaching dwpmusic's thread,
I went to the range today to primarily shoot my model 69 with some hotter loads. These were RimRockBullets 240gr hard cast lead SWC on top of 10 grains of 231. A mix of mainly CBC and Midway magnum brass. I brought my old Chrony. I discovered that if I shot very close to the top of the Chrony I got fairly consistent results. I used my 629-4 3" magnaported Trail Boss and got about 1050fps but with my 2.75" non-ported 69 I got right at 1000fps. I thought that was kinda odd. I didn't do any bench rest shooting. All shooting (model 69) was standing at 15yrds off hand. I found I could do rapid "controlled" 5 round strings and keep them on the 14" X 15" target. Plenty good enough for qualification. The few slow fire strings were probably 7" to 8". My age is showing in eyes and steadiness.

While shooting very low on the old decrepit Chrony did produce some acceptably consistent results it is sadly no longer with us:

Oh, if anyone is interested the 69 trigger tested out at about 11lbs double action and 5lbs single. It's actually pretty smooth and doesn't feel that heavy. I didn't check the 629.