I haven't shot 115gr in quite awhile since I've been reloading 124gr. Did some side-by-side shooting today with both of those weights. The 115gr is louder and noticeably harsher on recoil. Both were Speer Lawman. I really do prefer the 124grainers at this point. I wish now I had picked up more 124gr Lawman when I had the chance at $10.99 (I prefer using commercial ammo for formal training classes).