dj I've got a hardwood board set up (1 x 2 x 5")with 5 holes drilled in it. the center hole is just large enough for the primer, I've drilled a larger 1/2 counter sunk hole (maybe 1/8" deep) for a guide and just use a hammer and a large finish nail to drive them back out. As posted earlier I've finally had one split after I think 5 rounds. I shoot 90 to 100loose powder of pyrodex or t7 so max loads might use them up quicker.also Knight doesn't recommend it. I take a old sock, put the used disc in, tie it and throw them in with a load of laundry, doesn't get them spotless but cleans them up pretty good with very littleeffort on my part