Came up with an idea today, but I strongly doubt it is an original . Had my LNL setup with size/deprime die only and was running some .45 ACP brass through it and it dawned on me that while my primer tube is empty, I can screen for SPP at the same time by pretending I am seating a primer. The cases with small primer pockets will not let the primer ram go all the way up. Found 5-6 SPP cases this way and will check my resized brass tomorrow one by one to see how consistent my results were.
Question for the forum - is this a workable method or should I stay away from it? Will jamming the large primer ram, lightly, against a small pocket brass cause any damage in the long term?