I tried some 124gr Federal Syntech vs S&B 124gr and could not perceive any difference at all in accuracy or felt recoil impulse in any of the 5 guns I shot them through. Since I shot both types of ammo at the same range session, I also cannot tell if it was “cleaner”. Of course I am certainly willing to accept the idea that I am just not “perceptive” enough to know the difference. I still have a few hundred rounds of them left for another range session. Maybe I’ll try to pay more attention next time.