bronko22000
Which powder and what was your load?
The reason I ask is after doing some research on my own I did find that modern 'pillow ticking' is a 100% cotton but does have mam made fibers in that make is suseptible to heat...
This if from Track of the Wolf
Pillow Ticking: A traditional patching material. This 100% cotton is tightly woven to be "feather proof" for making pillows. Blue and white striped, pre-cut patches or packed in 1/2 square yard bulk packs. Some shooters wash bulk patching before use, others prefer it “as new”. Beware of modern ticking, which is a synthetic blend of fibers that melt.
and from RMC
Just like the OX-YOKE Wonder Patches, these Wonder Ticking 1000 PlusTM patches are lubed with Wonder Lube 1000 PlusTM. They are made of the highest quality 100% cotton engineered fabric with a high degree of thickness uniformity, that will be a pleasure to shoot. No other lube, solvent, cleaner of chemical is needed or should be used.
Again from someone that really does not know much about PRB shooting...