I was wondering about it how it effected everything. Right now my cases measured 1.913 to 1.925. I only have a hand full that measure the 1.92 they are supposed to be.
What is your max case length? That is what you are concerned about. If you have cases exceeding max length and no way to trim them, throw them in a bin and don't use them until you can trim them.
I usually do all of mine at once, because if I'm going to set up the trimmer, it's easier to do a bunch of cases at once rather than set it up multiple times.