That's an entire number of brass to trim, but I'd trim them all to one.745". A number of them may well not even touch the cutter with your trimmer, however you'd end up having nearly all of them getting a steady duration. **WARNING** In firearms that use a floating firing https://223cases74173.digitollblog.com/37201158/helping-the-others-realize-the-advantages-of-223-brass-for-reloading