Hoo boy! Have you opened up a can of worms. There are an incalculable number of patch lubes and each one has folks who will swear
by it and many more who will swear
at it. I have had good luck with Bore Butter. Okay all you folks out there in Forum Land who absolutely hate Bore Butter, I hear you. But, it works for me so I use it, especially since I got a couple of tubes of it as a prize at a blanket shoot. Anyway, I do not slather my patches with Bore Butter. What I have found that works for me is to lay out a piece of patching material and spread a
light coat of Bore Butter on it. I rub it into the fabric and then fold the fabric up and put it in the mocriwave for a few seconds to melt the Bore Butter into the fabric. You can also achieve the same results using a common clothes iron but be sure to wrap the fabric in some newspaper or you will end up with grease stains on the ironing board. Momma gonna raise hell!! When the fabric is cool, unfold it and you can either cut it into pre-cut patches if you wish or you can just use the fabric to make patches that you cut at the muzzle. The material should not have any grease on the surface, it should all be absorbed by the fabric. There will be enough there to lubricate your bore as you load but not enough to be messy. This will work in hot or cold ambient temperatures.
If you are one of those shooters who do not like Bore Butter or any of the Bore Butter clones, you can use the grease of your choice in the same manner. If you like Ballistol, and I do, you can dilute it in water (about 5:1 water to Ballistol has worked well for me) and saturate your patch fabric in the diluted Ballistol. Then the important step is to lay it out absolutely flat to dry. If it is not absolutely flat, the water/Ballistol mixture will migrate to the lowest point(s) and the fabric at those points will have a heaver coating of Ballistol while the high points will have a lesser amount of Ballistol after the fabric has dried. these variations in the amount of lube on your patches can effect your accuracy. Once the fabric has been lain out absolutely flat, allow it to dry. The water will evaporate leaving a very light coating of Ballistol on your fabric. This latter technique will work with any lube and diluent of your choosing. Many people swear by olive oil as a lubricant so you might try diluting olive oil in alcohol and using this technique to apply a light even coat of olive oil to your fabric.
Another thing you might consider if you like a heaver coating of lube on your patch but are worried about fouling your powder charge is to use a felt over powder wad to protect your powder from your lube. When I use these wads, I make my own from a pure wool felt. Never use a felt with a synthetic in it. It will really make a mess in your bore as the synthetic melts and coats the bore of your rifle. You can get pure wool felt from a company by the name of Duro Felt. They have a felt that is specific for making OP wads.
http://www.durofelt.com/image_26.html You can find inexpensive but serviceable hollow punches at Harbor Freight or you can buy a custom made punch at a
very reasonable price from one of our members who goes by the name of Ohio Ramrod. If you have a drill press, order one of his drill press adaptors. You do not turn your drill press on to cut the wads, you just use it as a press to press the punch through the felt. If you don't have a drill press, just use a mallet to punch out the wads. It is a LOT cheaper to make your own wads than it is to buy them pre-made.