That's an entire lot of brass to trim, but I would trim them all to one.745". Some of them may well not even contact the cutter on the trimmer, however, you'd end up with many them staying a dependable size. AmmoSeek.com does not vet or endorse any retailer shown on https://oncefired223brass65296.blogkoo.com/5-essential-elements-for-223-reloading-brass-56352500