I'm a newbie to reloading, at the recommendation of many here the Lee primer has worked well for me, have had a couple 22 hornet cases come out of the shell holder on one side, but that may be because I'm using the #7 and not the #20 as they list both for it, the #20 may be a better fit but doesn't come in the assortment box. I've used the primer for .270, 45-70 & 120 so far and I'm real happy with it.