I am loading 40 S&W for my SA XDm 40. Today I tried a little experiment with the OAL. The Lyman book says 1.135. So I took an empty case and seated a 155gr lead cast bullet long and dropped it in the chamber and closed the slide slowly into battery. I pulled the bullet out and measured. It came out to be 1.162. I did the same with a 180gr JHP and it came out to 1.187. 1.162 is about the longest i think because at 1.187 the bullet rubs the front of the mag. Now the question is, would 1.162 be safe? I did not notice any rifle marks on the bullet and I have read that ideal is about .010 off the landing. So someone please give me some guidence.