Ruger service center requires FedEx. Also, you have to go to a FedEx service center, not just anyplace that ships FedEx. The two closest to me were the north side of Anderson and the west side of Indianapolis. To ship a Ruger Super Blackhawk was about $70.00.
If its a Smith & Wesson, I've called them, received a prepaid shipping box in the mail 2 days later, dropped it off at FedEx and then receive it back about a week later with an extra mag.
second that. just did one with beretta.Contact the manufacturer and they should issue you shipping instructions. I just sent a Marlin via UPS and got it back the same way.