Hello everyone, I have a remington 1897 rolling block I picked up many years ago. It is chambered for 257 Roberts, with a bull barrel. It is not a rifle to carry out in the field hunting. I want to have a custom barrel made and not sure what caliber to go to. I want to be able to use it for Antelope, and Whitetail. Let me know your recommendations and if you know of a good barrell maker would like to know that too. Thanks for your help!