Yes, much softer shooting the UMC ammo. I got the gun, ran 250 rounds of Federal 115 g. Factory ammo through it and zeroed red dot for a competition.
I bought the yellow box of UMC with 250 rounds for the competition and never shot any before the competition in this particular gun, but I had shot it in my other PCC (Mag Tactical 9mm) and it ran great and very soft shooting.
Not soft shouldering the gun, but like I said when I switched back to Federal at the competition, all was well.