I use square slightly oversized (for caliber) patches. It is easier for me to cut hundreds quickly with a board and fabric roll cutter. I found the square patch works better than round with my fingers. The lube required for the square patch versus the round is not an issue with me.
DanL
That is what I use. I think it is called a Driz or Dritz Rotary Cutter. Buy the fabric in bulk & in a hour you can cut enough patches to last you for 10 yrs. Cut bout 3-4000 of the 1", 1.25", 1.50" size patches & store them in freezer ZipLocks. One must be most cautious & for sure Do Not get it a hurry, or you will be using bloody patches. The cutter is basically a round rotating razor blade & it Will remove fingertips before you even realize or feel it.
But seriously, once you get the cutter, board, material out & ready, in 15 min you can easily cut 5000 one inch patches. If your material is 32" x 32", 2 layers of material, that is 2048 patches in one cutting. So when I get it out I first look at what sizes I have on hand & then cut ? thousands of the size I need.
I guess ? 20 yrs ago I put a dial caliper in the truck. When I was by a place that had fabric I would check the material til I found several I liked. Found/bought fabric in bulk & just bought the whole bolt. Sometimes it is a PITA to find a certain thickness, so when I Do find it, I buy allot of it. I have loads for rifles I have shot for over 20 yrs & still have patch material for them. Keep each rifle/load documented in a notebook & a copy put away, as sometimes it takes days to work up the best load for a rifle.