That is excellent shooting. I've had a 340 and a 360 ever since they first came out. For me, the 340/360, with .357 mag ammo, is the nastiest recoiling handgun I've shot (followed closely by a 396 w/upper end specials). When I first got it, using Fed 130gr factory .357s and the factory equipped Hogue Batam grips, I split the web of my hand which required several stitches.
No matter how I hold it or what grips it's equipped with, it bites me somewhere. The 340 was my pocket carry gun for some time. It since been replaced, first by a Kahr CW40 and now with a CW45.
The following chrono data may be of interest to short barrel shooters. The first group are all from 1 7/8" 340/360. The second group were using one load - 185gr (yes 185gr, not a typo) with 14.7gr of Lil'Gun in various guns from 18" to 1 7/8".
Frome 1 7/8" bbl 340/360 ALL IN .357 MAG CASES except factory loads as noted:
130 Hydra-Shok, Fed Fact, Fed cases, Fed primers, .357 Mag, Fed Fact, 1159 fps
158 CSWC, Add, Mixed cases, Std primers, 13.5, H-2400, 1075 fps
158 JHP - XTP, Horn, Mixed cases, Std primers, 13.5, H-2400, 1009 fps
158 LSWC, Rim Rock, Starline cases, CCI Std primers, 12.7, H-2400, 967 fps
185 LFNGC, Beartooth, WW cases, Fed 200 Mag primers, 14.7, Lil'Gun, 1006.5 fps
180 LWFN LBT, Fed Fact, Fed cases, Fed primers, .357 Mag, Fed Fact, 905 fps
158 LSWHP, Rem Fact +P, RP cases, RP primers, .38 Spec, Rem Fact, 753 fps
130 Fed Am Eagle, Fed Fact, Fed cases, Fed primers, .38 Spec, Am Eagle, 680 fps
158 LRNFP, Meister, Mixed cases, Fed 100 primers, 9.6, Blue Dot, 1020 fps
158 JHP, Remington, Mixed cases, Fed 100 primers, 9.6, Blue Dot, 946 fps
Same Load (185gr BTB WLNGC) -- .357 MAG CASES/LOAD DATA -- from various guns/bbl lengths:
Marlin 18 Inch Bbl, 185 LFNGC, Beartooth, WW cases, Fed 200 Mag primers, 14.7, Lil'Gun, 1713 fps
Ruger BH 6.5 Inch Bbl, 185 LFNGC, Beartooth, WW cases, Fed 200 Mag primers, 14.7, Lil'Gun, 1388 fps
Ruger SP101 3.1 Inch Bbl, 185 LFNGC, Beartooth, WW cases, Fed 200 Mag primers, 14.7, Lil'Gun, 1160 fps
S&W M60 3 Inch Bbl, 185 LFNGC, Beartooth, WW cases, Fed 200 Mag primers, 14.7, Lil'Gun, 1174 fps
S&W M360 Ti 1.9 Inch Bbl, 185 LFNGC, Beartooth, WW cases, Fed 200 Mag primers, 14.7, Lil'Gun, 1022 fps
S&W M340 Ti 1.9 Inch Bbl, 185 LFNGC, Beartooth, WW cases, Fed 200 Mag primers, 14.7, Lil'Gun, 1006 fps
I googled Cor Bon and Doubletap -- the heaviest bullet they list is 200gr. Cor Bon claims 1,150 fps from 6.5" bbl and Doubletap 1,300 fps from a 6 incher and 1,200 fps from a 4" bbl.
FWIW,
Paul