Thanks for the tip, and yes, I know there are other forums where I can get answers to some of these questions. However, there seems to be a lot of MS1910-specific knowledge here. I thought maybe someone had encountered the problems with chamber size before.
And regarding the speed, yes it would be a good speed if I could achieve it without problems. But as soon as I reach these speeds I need to use a good dose of violence to reload, and needless to say I can't have that if I ever want to use it for hunting.