Its my understanding that the old ones are solid with "chevrons' milled into the bottom side? Much like those I received with my 550B a couple yrs ago? But maybe I'm wrong.
Below posted by GPZ4189
Jan 20 2005, 09:23 PM
"I was having the same problem with my primer slide sticking. I recently, about 2 weeks ago made a trip to the Dillon facility in Scottsdale, AZ. I brought my small primer slide to them to be smoothed. The sales rep took it back to the shop while I browsed around for a couple of minutes. To my surprise he returned and said they don't smooth them out for owners any longer. I was puzzled, and thought I would have to take the time to smooth it myself. Then, from below the counter he brought up a new type of primer slide. It was half the weight as the old one and was hollowed out underneath. It just rides on to thin rails and it is completely teflon coated like a non stick frying pan. I have since loaded about 1000 rounds with it without touching my assembly. I only occasionally blow out the dust and debris when I add more primers to the tube. I would call for the new type of primer slide immediately. I'm sure Dillon would be glad to mail them to you. "