Ol Thing: I grease my pre cut patches in stacks, greasing one side liberally, then putting it grease side down on a patch with the " dry " side up. I keep going until I have a stack to big to continue, then begin another stack. I have brass containers to hold the patches I need during a shoot, but carry the extras in zip loc baggies. If someone wanted me to be P/C, I would wrap them in wax paper, and then in oiled leather.
This method gets both sides greased, and enough grease is in between both patches to make sure the lube soaks completely through all the patches.
I have never seen any evidence that the patch does not hold the ball tight in the rifling. In fact, every recovered ball shows evidence of the fabric Weave impressed on the lead ball where the lands squeeze the fabric against the lead ball, or vice versa.
The folks who made this lube originally said that you can't use too much of the stuff, and I believe they are correct. The more lube in the bore, the more soft residue remains. If you have too much, you may see some drips at the muzzle when the gun has fired, but that is the worst of it. I have sensed that bore butter seems to get into the steel and make the bore slicker, in subsequent loading. It takes my gun about 4 or 5 shots to get to this point, but after that, loading the ball down the barrel seems to be easier. The first time I noticed this phenomena, I thought my pre-cut patch had slipped off-center, and that explained the easy seating. But, the ball hit in the group at 50 yards. I picked up the patch, and found nothing to indicate it had been off-center. The Next PRB went down as easy as that one did. It also shot to the group, and I pulled out my micrometer to see if the ball diameter was different, to explain what I was feeling. Nope. Not the patch thickness, either. So, its the lube.