I am new to loading BP cartridges for my Sharps. I just purchased a Shiloh Sharps 30" barreled gun. I am loading 70 gr. of 2F behind a cast 500 gr. boolit. I am loading new Starlight cases, processing them exactly the same way. I did 20 but 10 wouldn't chamber in the Shiloh gun. They all fit in the Pedersoli I own but stick and don't seat in the Shiloh.... I took out my micrometer and everything I measure comes out the same... I even measured down the case and found no variances.
Is it possible the compressed powder is bulging the case just above the case base? I just can't seem to work this out.... Any suggestions???