I don't know your cleaning routine, but maybe it needs a good cleaning. Sometimes I get hard carbon accumulating and am not aware of it. Simple cleaning will not touch it. Apache recommended I use a foam cleaner (wipe-out) and let it soak an entire weekend. Black crud came out of what I thought was a clean barrel. Repeated a few times till is came out clean again, always letting the Wipe-out sit in the barrel overnight at least. Eventually it did get clean and shoots as good as ever.