1 7/8" M340/360 and 2.75" M66-8
I think this is the type of info OP is looking for. FOR INFO ONLY - THE 200Gr LOADS ARE NOT IN ANY PUBLISHED DATA - FOR INFO ONLY
S&W M360 Ti 1.9" 185 LFNGC 14.70 Lil'Gun 1,023 fps
S&W M340 Ti 1.9" 158 CSWC 13.50 H-2400 1,075 fps
S&W M340 Ti 1.9" 158 JHP - XTP 13.50 H-2400 1,009 fps
S&W M360 Ti 1.9" 158 LRNFP 9.60 Blue Dot 1,020 fps
S&W M360 Ti 1.9" 158 JHP 9.60 Blue Dot 946 fps
S&W M340 Ti 1.9" 158 LSWHP .38 Rem Fact 753 fps
S&W M340 Ti 1.9" 130 FMJRN .38 Am Eagle 680 fps
S&W M340 Ti 1.9" 130 Hydra-Shok .357 Fed Fact 1,159 fps
S&W M340 Ti 1.9" 180 LWFN .357 Fed Fact 905 fps
Labradar Muzzle Velocity (familiarization run)
60 Deg F
S&W M66-8 2.75" .357 Mag
130gr Fed Hydra-Shok JHP "Personal Defense" PD357HS2 H …….. 1,416 fps avg (84 fps ES) -- two rounds
140gr Underwood Xtreme Penetrator (Philips head mono metal).. 1,422 fps avg ( 5 fps ES) -- two rounds
158gr Horn Xtp - 15.0gr A2400 Std small pistol, new Starline...… 1,316 fps avg (49 fps ES) -- six rounds
165gr CSWCGC (358156) - 13.0gr A2400 New Starline ...… 1,070 fps avg (49 fps ES) -- six rounds
180gr Buff Bore …………………………………………………………………………….. 1,312 fps avg ( 6 fps ES) -- two rounds
185gr LFNGC (Beartooth), 15.0gr Lil'Gun, CCI 400 New Starline.. 1,228 fps avg (14 fps ES) – two rounds
200gr WLNGC (leadheads), 13.4gr H110, Fed 205, New Starline.. 1,102 fps avg ( 4 fps ES) – two rounds
200gr WLNGC (leadheads), 14.4gr H110, Fed 205, New Starline.. 1,155 fps avg ( 2 fps ES) – two rounds
(purported to be the “Doubletap” load info)
200gr WLNGC (leadheads) handload with Lil Gun ………………………. 1,266 fps avg ( 2 fps ES) -- two rounds
Load data not given -- maybe too much of a good thing. Spent cases fell from chambers, and no obvious signs of over pressure. Recoil was heavy. Don't even know if this stabilizes.
It appears that my 2 3/4" M66-8 is a "fast" gun.