Well, my Uberti 1860 came in today!! I only ran about 24 rounds through it.....and of course a cap got jammed under the hammer during the course of fire lol. I am running Remington #11 caps......but have had numerous misfires. I don't know if this is caused by the caps, nipples, or a light hammer strike. I noticed my 1858 Uberti has a noticeably harder hammer strike, and the 1860 is lighter. I pulled it all apart after my range trip, and cleaned it inside and out. I noticed the main spring seems a little short, or that may just be by design. Had a helluva time getting the gun back together (and I've owned Colt repros before). Any suggestion as to what is causing the misfires? Also note that all misfires were eventually cleared by pressing the cap further down on the nipple allow it to fire. I have also used the same exact nipples on my Uberti 1858 with Treso nipples, and they fire every time!