I asked SAC if the Ugly Primer Seater would work on the NEXUS. They said no. Well, they were wrong. I couldn't find any info on the web where this was attempted before so I just did it myself. I cut a primer tube in half to fit under the handle and just fabricated a piece of aluminum plate to sit over the Nexus case holder. Works like a champ. I will be making a more permanent plate that will have pegs that slip into the spare cam stops holes, just to hold it in place.