I recently loaded some cast rounds for my 9.3x74 double, using Norma brass, and the action didn't want to close. I thought the bullets were probably not seated deep enough. I checked and found that the primers were standing proud of the case. I cleaned the primer pockets and the primers were still high. I ended up reaming the pockets slightly deeper. That solved the problem. I've never had that problem before in many years of reloading. In a bolt action the bolt would have been slightly hard to close. In the double it was impossible to close the action. Glad I didn't have a slam fire.