I have a Mossberg 835 Ulti Mag Turkey shooter 12ga with an overbored 10ga smooth bore barrel on it. What size brush should I use to clean it with. I have read the Stickie in the Shotgunning 101 Library about cleaning and the overbored barrel was not mentioned. Should I buy a 10ga brush or just use the 12ga I have with patches or cotton cloth wrapped around the brush? TIA