I'm having an ejection problem on our 1873. Gun works fine until you go at a decent speed and then the empties seem to be getting caught with the rim behind the carrier. Seems to be every 2 or 3 shots when lever fast.  I recently upgraded to an aluminum carrier and it seemed to shoot fine but we didn't shoot it too much before the mainspring broke. After replacing that we noticed the problem. The timing looks perfect to me. As the next round comes up, the rim barely kisses the lower bolt ta