The basic concept here is "making a sincere effort to care for your weapon on a routine basis" versus neglecting and poor maintenance. No preservation method will take the place of neglect.
You will of course get many repies on this topic. Bottom line is they are your weapons, care for them the best you can with whichever method you are comfortable.
I have a two lube philosophy for Muzzleloading that I've been practicing for over 35 years.
1) Lubricants to long term protect my ML weapons from corrosion.
2) Lubricants for shooting/field purposes.
I am 200% certain that modern synthetic lubricants protect for corrosion vastly superior to natural lubricants in every case. I use synthetic lubes for all of my weapons and firearms. Muzzleloading weapons do not have a unique requirement for corrosion protection. If anything they deserve superior protection in every case due the corrosive nature of black powder and cleaning with hot soapy water.
I am also certain that natural lubes are the only option for shooting lubes and mix with BP and substitute fouling where synthetic lubes will tend to cause tar depending on the lube. There are some synthetic lubes with high flash points that also mix with BP.
For long term moisture displacing protection at the molecular level inside the bore (Same as my centerfire weapons):
Otis 085-Ultra Bore synthetic water displacing lubricant. (I did use Clenzoil in the bore for 30 years and switched to Otis 5 years ago based on a recommendation from a friend with the USN testing labs. Superb results thus far.).
http://www.otisgun.com
To prepare ML bore for shooting, swab the barrel with 99% isopropyl alcohol swabs (2-3) followed by dry patches. Swab the flash channel with alcohol pipe cleaner or q-tips.
Lube the nipple threads with choke tube grease and install the nipple. Lube the barrel with a natural lubed patch.
Ready for the field.
Prior to storage after the barrel is cleaned with boiling hot soapy & then clean water, dry patch, alcohol patch, dry patch, I use Butches Bore Shine (http://lymanproducts.com/butch/index.htm) patche followed by a dry patch and then saturated 085 Ultra Bore patch in the barrel. Butch's will remove any buildup or varnish and prep the bore perfectly clean state.
For long term moisture displacing protection at the molecular level outside the bore, gunstocks, triggers and locks (Same as my centerfire weapons):
Clenzoil.
www.clenzoil.com
For shooting lubes for patches, conical and for keeping the bore lubed in the field:
Rooster Labs BP lubes, T/C NL1000 and Hornady Great Plains Lube.
www.roosterlabs.com
www.tcarms.com
www.hornady.com
:imo: :m2c: :thumbsup: