Fit my pietta 1858 like originals, but they're closer to#10's than 11's. I have used both size caps with equal success. Pinch the 11's a little out of shape. Switching from CCI to remington makes this revolver 98% reliable (greasy fingers fouled caps). These nipples are going on all my future C&B's.
No, not those kind....These look great and fit in the cylinder perfectly. Have yet to test them out. Let me know when they come on sale and I'll buy two more sets!