I also noticed some amplified muzzle increase and recoil when employing defensive rounds which include Sig V-Crown masses, but it wasn’t unmanageable. Don’t have an understanding of all the folks raving about this gun. I sent mine back again to kel-tec for support there customer service stinks in my head) https://ithaca-deer-slayer49505.blog2news.com/40198256/5-essential-elements-for-9mm-handgun