ive got a question about the hornady lock and load guage,,,the modified case in 30/06 (my rifle) is shorter than my trimed cases,, how can i get an accurite reading this way???? hornady says it can make cases that are to my rifles dimintions if i send them two fired un trimed cases and $11.00 plus return envolope and shipping,, anybody know what size the threads are in the modified case????