I've also read from an old post on this site that a stronger spring might be a good idea,as the factory ones might be a little underpowered when using percussion caps.I'm not sure what adjustments were made to this gun if any,but replacement parts didn't turn up to be all that expensive so that's a plus.Should the tophat fit tightly on the nipple and in the firing pin? If so then I might need a smaller nipple (#11) I think someone has also mentioned that a #1 cap might ignite better? I took the weather shroud off because it is said that it could cause even more build-up when shooting multiple times.I'll put it back on before I hunt though.Do you think the weather shroud would effect the ignition?