One of my favorite range guns is the 2 ¾” M66-8. I ran some limited accuracy tests when I first got it and settled on 13.0gr of A2400 under a 165gr CSWCGC. I’m sure other loads could be developed but I have a bunch of the 165s.
No problems to date thru 900 rnds (have a 4 ¼” M66 with 2,800 rnds – no problems either). Never had a “light hit” with either the M66 or M69 (have about 12,000 rnds thru 4 M69s) even though I have had to tighten loose strain screws several times during periodic maint.
I shoot both (66 & 69s) double action but have never messed with any springs. I want my guns to fire no matter what primer or ammo is in the gun. I don’t shoot competition, so I’m probably missing something.
The 2 ¾” S&W K & L frames that I have are a lot of fun, are plenty accurate and reliable. Of course, individual guns can/will vary.
I’m mostly a recreational shooter, so I can’t really comment on potential tactical service.
Took the 2 ¾” M66 with the 165/12 2400 to the range this afternoon. Plate rack with various geometric forms at 27 to full size popper at 75 yds with various sized poppers in between. Ran out of ammo before I ran out of fun.
Here’s a light load that I tested with good results – bottom group.
For the purposes that the OP stated, I say go for it.
Paul