forming 300 blk casings from 223 brass (for now i’ll only be using LC stamps). i’ll be using a dillon rt1500, with the gsi toolhead and trim dies, on an xl750. i’ll have a separate toolheads for prep/sizing and for loading. these will be plinking rounds.
i just want to verify that i’m going about finding the loading data correctly.
bullets (based off a recommendation on 300blktalk forum):