Thanks for viewing my question. I've read quite a few ideas from owners of the 460 on what size brass bore brush to use but the threads were over 5 years old. Just looking for anyone's recent cleaning experience and what size you use, seems some use a 50 cal. brush..?? I know that it is recommended to use a 45 caliber since the 460 is basically that bore. I would "think" that a 50 would be a snug fit and would bend the ends over when in reality you want the ends of the bristles to do the work and not be bent over each other. Thanks for your guys/gals time and have a great day.