The bullet was seated properly; I have a mark on my ram rod that I use to gauge this. I shot two primers before loading but I did forget to swab the barrel. The first shot did go off so I assume that would cancel out any misfires due to oil or moisture? The powder sub is a year old and has been stored inside the house and dry. I contacted the powder sub. manufacturer and was told my flash hole may need cleaning with a drill bit. I had a spare breech plug that was brand new, so I screwed it in and the first shot fired. Second shot misfired. I opened a new container of the same powder sub. and have shot seven in a row without a misfire. Maybe the original container is bad but I am told shelf life should not be an issue. The same combination of gun, powder, bullet, and primer worked flawlessly last year for twenty plus shots. Any thoughts?
Not sure what you have going on but I would think if the bullet moved the primer went off. Is your powder old or damp? Was the round seated properly? I also always pop a couple primers and swab the barrel before loading to be sure there is no moisture in the barrel before loading. Good luck and be careful misfires can be very dangerous.