Well I was at Yolo and the River City Regulators with Hell R Highwater this weekend, and used the 56-50 infantry rifle as my main match rifle. It shot clean, and worked perfectly. I did notice, however, that it seemed to catcch a little after firing 30 rounds or so, and I chalked it off to fouling and sticking cases. I did a post mortem, however, and found it was not sticking cases after all.
I remembered a trick to help smooth the action and ejection. On the back of the breech block is a flat surface that engages the frame. At the top of this, it has a somewhat abrupt transistion to the top of the block. This makes you have to be more positive with the down stroke, and robs some inertia. I slightly (and I mean SLIGHTLY) broke this corner and rounded it a tidge with a dremel. It made all the difference in the world. Working the action is 50% easier!
I recalled that I had a simular, though worse, problem on an original that I had fitted a S&S breech block to. In that case, I found I haad to break off this corner on the new breech block, and it cured it completely
REMEMEBER, ONLY SLIGHTLY ROUND THAT CORNER. It will remove that little "stickyness" just before opening.
With that said, it was great to finally meet Hell R High Water face to face, and enjoy a possee with him!