A fellow I knew got into this caliber and we discussed various minor functional issues he had with it, including chambering of some newly converted cases. A veteran bullseye shooter commented that it was very helpful to use an M-die when prepping the cases for loading. This fixed the chambering problem and the chamber catching on and deforming the case neck. It was pleasantly accurate, but leading seems to be an ongoing problem. I get the impression a different lube and a softer alloy would have been helpful.