Did some shooting with and without on a 8.5 lb 6mm CM Saturday. Friday night I watched Utimate Reloader's YouTube video where he found no difference on a 308 but a lot of difference on a 300WM, albeit with a different design but still a brake on the end of a suppressor. I tried this rifle both ways after watching that because I figured I wouldn't sacrifice the length and weight if it didn't help - but I thought it did help. Now, my 6CM has an 18" barrel (this is a hunting rifle), so I'm wondering if the difference in gas pressure into the suppressor of a 18" barrel vs a 24"+ makes the brake more effective? Seems to make sense in my pea brain?