I don't find it to be much of big deal to ream the pockets with a hand tool. It doesn't take any longer than deburring or chamferring. I like to do them in small batches, a couple hundred cases, where I ream and uniform the flash hole (same tool/same operation) as a first step, then uniform the pocket depth, which usually cleans the primer pocket as well. It only has to be done once, and then they go in a "prepped" box for whenever I get around to loading them. It's fairly mindless, and sometimes that suits my mental state.