In the past two months, I have had two Uberti revolvers (an 1860 and 1851 Navy) both develop miss-fire issues due to weak mainsprings. A weak mainspring may make for a light, smooth action, but it does nothing for reliability when the cap needs a good WHACK! There are reduced power spring kits all over the place for the CAS crowd. Does anyone make a full-power or heavy duty mainspring? If worse comes to worse, I will buy Colt factory SAA mainsprings and call it a day.