I was very pleasantly surprised that my Osprey45 suppressor on my Springfield 10mm reduces recoil so drastically. It makes my 10mm shoot about like a 9mm (subjective but yes it’s a radical reduction in recoil no matter how you measure it).
What is actually occurring is that the spring in the piston (which is inside the suppressor) changes the inertia curve so that the extra mass of the suppressor does not inhibit the action of the recoil driven slide of the firearm. The useful side effect is radically reduced felt recoil. Don’t shoot a suppressor unless you want to buy one because you will be hooked for sure.