Have a problem you round ball revolver shooters may be able to help me with: I have two Fpietta 1858 remington replica revolvers. While shooting them I have had problems with the caps backing off from the recoil and tying up the cylinders or falling off the nipples from the recoil. I've tried different size caps and different brands of caps to no avail. Anyone have a solution? Different nipples that fit the fpietta remington etc.? Open for suggestions. TIA