I've recently gotten an 1894C and love it. I have had zero problems in putting about 100 rounds of each magnum and specials with chambering, firing and cycling.
That being said, I was using WWB 38 special bulk packs and had TERRIBLE accuracy issues with said rounds. Not even vertical stringing - these rounds were all over the paper. Magnum rounds were giving me a 1" group at 50 yards. YMMV. I'm gonna try loading up some of my own specials and magnums today and see how it works with them.
--Rock