RE: best way to unload?without firing?
Co2 discharger or bullet puller - then push out everything else using ramrod entrance thru the breechplug hole. Then do not bring the ramrod & smaller jag back up the same way. Let it exit thru the muzzle-end. Then screw on the breechplug again without any anti-seize - in order to block any leftover powder from getting on the breechplug threads. Swab the bore & oil again. Then remove breechplug - clean the breechplug face with a rag - make sure the small hole is not clogged with a sewing needle - put anti-seize on it & re-install.
So after doing all this, the Co2 is much easier.