I reloaded rifle bullets for the first time last night. I am reloading 30-06 with 49.5 grains of accurate 4350 powder and topped it off with a 200 grain nosler partion. I measured a factory load and set my bullet depth at that length. However when I reloaded, 2 cases came out with bulges in the necks. I was wondering what is causing this, and what I can do to fix it. Any help anybody can provide will be greatly appreciated.