Ten mile
PP bullets will certainly work with your rifle. If you decide to give it a try, here is the math I gleaned from the book:
I use, from OfficeMax, Strathmore tracing paper .0018" x 4 = .0072" (a two wrap patch)
Throat diameter measurement from chamber casting minus .0072" equal the bullet diameter needed.
The only thing tough about this is measuring the paper material thickness accurately, I micrometer measured 10 sheet stacked thicknesses and divided by 10 to get a precise single sheet thickness measurement.
An easy patch cutting and rolling method is covered in the book.I followed instructions and a tabletop paper cutter worked great.
A benefit you may have overlooked regarding paper patching for your rifle is the extended long range benefit from the significant velocity over lead that PPd bullets can be shot accurately. They are inherently more accurate than just cast bullet or jacketed bullet shooting when you do it well with a good fit to the throat. Leade contact is not needed for stability with a PPd bullet/patch that fits with a slide fit on chambering. The fit is the stability for a good start. A truly good fit with a PPd bullet will take 2 pounds more finger push to chamber than a cast bullet or jacketed bullet that doesn't contact the chamber with a sliding fit.
I cut the patches wide enough so there is enough for a bottom fold and 1/2 of the ogive to be covered. I roll them dampened with Lee Sizing lube and rub them with powdered graphite on a small 2x2" scrap of Chamois. They are ready to load when dry. The patches are strong, water proof and very abrasion resistant. Plus, they are cute and everybody asks about them.
Your rifle shoots well with what you are already doing, but I believe a well fit PPd bullet of similar weight and charge will shoot 10% smaller groups.
Gary