After a year shooting an XD-9 Service, I recently moved to an XD-40 service. Put in a Don's guide rod with 22# spring. The first rounds I shot were Federal 40 180 grain FMJ. Used them up and recently bought a box of Winchester 40 165 grain FMJ. Went out and shot about 30 rounds today in between snow storms. I'd swear there was less recoil with the 165 grain Winchester. All things being equal, will a smaller weight bullet (15 grains), in the same caliber, produce less recoil? Opinions and comments always welcome. Thanks.