I got mine recently with the 6" barrel.
0,25g: 173m/s = 3,7J , 0,45g: 135m/s = 4,1J
On short distance with the 0,45g BBs it even penetrates the thick soup cans onesided.
Shot it on 8m, but I would say, "bulls eye" is only possible up to 5m.
If I can test it locked into a vice I will update a precision test.
shot hands-free isn't overly meaningful with my shaky hands... isn't very precise yet.
Still good enough to shoot cola cans up to 8m (maybe up to 10-15m, I will tell when I can test).
It's also available from different brands with slight differences.
The Dan Wesson and the Umarex 357 come with shells for .177 BBs.
The Crosman SNR357 comes with shells and a smooth bore for .177 BBs and also treatened barrel for diabolos. (but i'm not shure about that.)
And then there is the SRC Titan which is a low powered field use airsoft version.
None of them has a hop up or bax system.
Anyway it's a funny plinker and barks quite a bit