None of the various presses did a decent job of priming, IMHO. If you study the results of most of them, the primers aren't even seated squarely. One fellow who was kind of meticulous, insisted on priming with his press, and I quizzed him about why he insisted on using an inferior method; turns out, he would rotate the case, and seat it 3 times...effectively reducing the errors in the system. But, why? Though I'm no fan of most Lee products, their Auto Prime II is the best priming system I've tried. Its fast, has good feel, and seats the primers perfectly square.