The effect of OP wads seems to vary from one gun to the next. A properly fitted OP wad (slightly tight) will prevent burning through thin patches when shooting a heavy load. They are helpful with keeping fouling down when they are properly lubed with a light amount of lube. Too much lube, especially if it is a thin lube such an some kind of oil, can contaminate your powder charge. My personal choice for OP wads, when I use them, is 1/8 inch thick hard Duro-Felt. I usually use them dry but in some rifles, I will put a small amount of Ballistol on them to keep my fouling down. You can order sheets of Duro-Felt from the company by that name and you can find it by simply Googling "Duro-Felt". You will need a punch to make your wads and I highly recommend one from one of our Forum members who goes by the name of Ohio Ramrod. He will custom make a punch for you for an extremely reasonable price of about $10. You want your wads to be a snug fit and you can't always get that if you use a commercial hollow punch. If you want to lube your wads with something like Bore Butter, just spread a thin coat of it on a sheet of your felt and put it in the microwave for a few seconds to melt it into the felt. Then just punch out your wads and you're good to go. When I use Ballistol, I find it easy to put some Ballistol into a small dropper bottle and just apply two drops to each wad and them put them into a pill bottle and let them sit for a couple days to allow the Ballistol to soak into the wads. Properly lubed, they will feel practically dry and you will not be able to squeeze out any lube when you squeeze them between your fingers as hard as you can. When you fire your rifle, there will be enough compression to squeeze out a tiny amount of lube and it will take out some of the fouling as it moves down the bore. Of course, it is always best to wipe between shots to keep the fouling down and keep the bore the same from shot to shot. Use a patch that is just damp with a mixture of 1 part Ballistol, 1 part Lestoil and 10 parts water. Run your damp patch down your bore with one single stroke, and then remove it with one single stroke. Do not pump it. One single stroke down and one single stroke out will keep your bore the same from shot to shot.
Go ahead and use snug fitting 100% wool felt OP wads, they will not hurt a thing and most likely will help. Use them dry or lightly lubed, your choice.