imho, and far better than a "greased" patch, i would recommend a "dutch" dry lube patch strip, made with a 6:1 mix of water:ballistol.
ballistol is water soluble oil. i mix up a pint or two. cut patch strips about 1.5" x 12" to 18" - do NOT make individual patches, you want to use a patch strip that you'll cut off after sinking the ball down just slightly past the muzzle. this will insure that the patch is uniform in all directions, which is something that can never be consistently accomplished with a round or square precut patch because it's near impossible to center over the muzzle.
after soaking the patch strip in the dutch lube, squeeze out any excess lube back into the pan. now here's the important part - lay down each patch strip on a FLAT and LEVEL surface and allow to fully dry. the level surface will insure that while drying the lube will not wick down more to one side of the patch strip than any other side. save the dutch lube in a closed container, and use it again!
when dry, it's ready to use. roll up a few strips for yer possibles bag, tote a small patch knife and yer good to go.
as with any and all muzzleloaders, experimenting with ball diameter and patch thickness are important. the same is sorta true with the dutch dry lube - 6:1 is a good starting point but you can go with less lube at 7:1 or more lube at 5:1 - or any variation thereof.
while the dutch lube does a yeoman job of lubing the ball AND is helpful in cleaning out the tube after firing, it is advisable to run a MOIST (not wet) moose milk patch up/down the barrel ONCE, between shots. along with the dutch dry lube patch strips, i have a small plastic flip top bottle with moose milk, and some precut cleaning patches.
using the above process with all my muzzleloaders has made my shooting experience far more enjoyable and easier - AND more ACCURATE, to boot.