9mm revolvers can be ammo finicky
Some brass will expand & stick & others won't
You almost gotta test & see what works for your cylinder
I've had 3 Smith 940s & a Ruger SP101 9mm + a 642 that I fit a 940-1 cylinder into
It seemed that many of the 940 cylinders had rough chambers & they would stick like glue with most if not ALL ammo used
The tapered chamber is what causes the problem mostly
I've heard good things about the 905 but haven't had the chance to shoot one yet
I also had a Smith 547 that was always 100% with any ammo used but it's a different animal as it has a second firing pin that strikes the case forward so it won't set back & also doesn't use moon clips & tiny extractor segments to extract..