Love Hickory but it has it's limits.
On most of my SideLocks, I try and maintain their traditional Hickories. For hunting, I replace the Hickory with a poly rod or black coated aluminum. I don't want to be in a position of breaking a Hickory in the field even though they are tough,
about all they are good for, is loading. When on the bench, I use a range-rod, with bore guide. They are made of a poly yellow jacketed fiberglass and made by TC. I make my own Hickory and Delrin plastic rods. I'm sure there are other equally good plastics but have been using Delrin, for a number of years and the last I bought was black from McMaster Carr. ...
Watch out for solid fiberglass rods as they will eat your muzzle. .....
Be Safe !!!