When I buy new bulk brass I give them a quick neck resize to round the case mouth then trim to min length. This way I start with a known length. Occasionally I will trim slightly smaller that min trim length by accident. When this happens I throw the offending case away. I always figured that there was a min length for a reason.
My question is: have I been unnecessarily pitching good brass for no real reason? What do other folks do in this situation?