I recently purchased a 500 & it started having "issues" & had to send it to mossberg service center in texas ,was wondering has anyone had any experience with them.I called them & they basically said box it up & UPS it to them with a brief explanation of the problem .I bought the gun used & seemed fine but when loaded with shells ,The shell elevator would jam & not feed consistently plus had an unexpected slamfire incident (finger off trigger ,safety on) & fortunatly just a hole in the wall (already fixed wall ,no pics sorry) but really wondering what to expect to pay for the service call if anything??