This is a three shot group at 50 yards per with Sig 125 OTM ammo. I normally shoot Barnes, but couldn't find any before my hunt. So to answer your question, the suppressor doesn't appear to have any affect on the guns performance. I still need to zero at 100 yards, but only had time to zero at 50. From an 8.5" SBR I'll take this type of groups. I didn't have the best rest while zeroing, so I think the gun is capable of a little better performance.