Maybe I should at that. When they're done, they're either 1.25" square or 1.25" round. I have no problem with either. The rod I use is a Denny Phillips with and integral jag. I think the diameter is .1875. They work very well, but are very tight in the bore with a big jag like a Dewey rod would have.
I would not want to use synthetic because the synthetic I have seen seem to slide in the bore rather than removing residue. I also won't use the Hoppe's special that is available at Wal-Mart because my rod will go right through them. Sometimes at the breech; sometimes mid-barrel.
Well, back to fields.