I had some primer problems also.
I got fairly adept at field striping the Star.
After lots of cussing, frustration, heavy handed problem solving, help, and suggestions, it now hums right along. Just like Mama's sewing machine, it don't miss a stitch.
I am currently using a different brand of primer instead of the CCI. Its gonna take me a L-O-N-G time to use up 5,000 CCI primers in the Rockchucker. They ain't going back into the Star 'tho.
Resist the temptation to employ 'bigger hammer' philosophy and a heavy hand on the Star.
salty