Hi All,
Well today I had a chance to go to the range with my 66-4 3" K-frame (ported) and 686+ 3". I rented two J's, a Model 640 Centennial and Model 60 3". I put a box of .38 Specials through the two revolvers, mixed in a few 125gr +P Gold Dots and .357 110gr HP.
What a kick

!! None of the loads presented a problem. The guns shot to the point of aim at 7-yards. I was required to use range targets which were Police Silhouettes blue w/ 4" white CM bull. Out of the 60 to 70 rounds, five were out of the bull's eye. One a .357 anticipation/flinch which I was able to correct on the subsequent rounds.
I was truly surprised by the Mod 640 - the first four holes were ragged with one small outlier. I was suspecting to be all over the "map" but I'm impressed on how these guns shoot.
I can feel a little tightness in my wrist, no pain and the standard synthetic grips on the 640 were certainly adequate. The M60 looked like it was gripped with Uncle Mike's Boot Grip - I use one on my K-frame - and it too did a good job.
As I was check out, the range master pointed me to a J-frame "Pro". A 3" Model 60 with slabbed barrel and some other extras like night sights. That wasn't a rental, but a nice looking firearm.
I'm in the process or re-reading all your input and integrating it with my experiences of today. I also did that before going to the range and tried to incorporate as many of your tips as was possible.
Added in edit: I'm sure comparisons of these two J-frames to the other guns shot today alongside the J's are obvious. I won't belabor the points, but will say that in terms of loudness and muzzle blast, the two J-frames seemed to be quite similar to the experience of shooting my ported 66. In terms of handling, the ported 66 does do what it's supposed to when you hit the .357s and it's a bit better behaved on that experience, but the flash from the porting is another detractor. IME today, the J-frame and ported K-frame sound and flash quite comparably.
Thanks Again,
Best Regards,
Roger