My .45 target rifle likes a particular material [ I have about 3 yards left of what I bought 6 years ago ]
So far, I haven't found a duplicate, and the group opens up with anything else. Not much, but enough to make a difference. On a calm day, that gun will shoot inside an inch at 50 yds, which translates into 50's
on the buffalo target. Even with the same thickness patch [ different weave ] the group opens and I'm shooting 49 or 48 etc. Again, that is a calm day, so the test is the gun/patch/ball combo
The ' good stuff ' is reserved for that gun only, and the search for more material continues.
I could start from scratch, and play around with powder charge, patch, ball combos, but it sure is a lot easier to have a large stock of the materials in the accuracy recipe . When you find something that works- buy as much as you can !