The other day I went to the range with the G23. I had 2 boxes of Federal American Eagle 165gr and 2 boxes of Sellior & Belliot 180gr. Wow, what a difference in recoil! The Federal felt like it was going to tear the slide right off whereas the Sellior felt like shooting 9mm. So out of all the .40 FMJ range stuff you have shot, what do you think produces the least amount of recoil? Brand and weight.