That's a complete lots of brass to trim, but I would trim them all to one.745". Many of them might not even touch the cutter in your trimmer, however you'd end up getting virtually all them remaining a reliable length. AmmoSeek.com won't vet or endorse any retailer shown on This https://bulk-5-56-brass27383.mpeblog.com/66747225/once-fired-223-brass-bulk-no-further-a-mystery