I have been a long term fan of Greg's brakes but I was also impressed with the Ruger Precision Rifle 338 right out of the box. I even had my own doubts that Greg could improve on Ruger's design even though the tank style brake was garish and huge!
I hummed and hawed over purchasing the first TF brake for the RPR .338 ever manufactured but once I did.....well, let's just say I had to pick my jaw up off the ground. I was staying on target much better, recoil was soft like a .223 remington, and my groups went from 3/8MOA to sub 1/4MOA. That's what barrel harmonics and not anticipating recoil will do I suppose. For more information on the Terminator TF check out Greg's test video here: https://www.youtube.com/watch?v=AH-34pyJDe4&t=10s