Why does TC warn against using lube with sabots? Probably because it could elevate pressures a little bit more, especiallywhen loadingmaximum powder charges, and during cold weather when the lube hardens.
However whenused sparingly it shouldn't really cause any harm and many claim that using it does have somebenefits.
Some folks use it tohelp the first shot out of cold clean barrelshoot to the same pointof impact as a fouled or warmbarrel will, andto aid with loading tightly fitting sabots.
And it shouldn't cause tight fitting sabots to strip the rifling. Sabots aren'tas susceptible to stripingas looser fitting patched round balls are, since they are moredeeply engraved when loaded.
Only a fractional amount of lube is actually adhering inside the corners of the rifling anyway.
Muzzle loading shooters are practical folks, andwhat mattersto them the most is finding andusing aloading procedure that produces good consistent results in their rifle, and maybe usinglube does help tocut down on friction caused by plastic fouling residue upon eachfiring, and makes for betterloading & firingconsistency, velocity and accuracy, even as the barrel heats up from multiple firings.