Switching to a muzzle breaks looks to have helped

[lazyengineer]

How loud was it, was there a noticeable increase?

There was a notable increase in noise. But since Grendel is lower Pressure than 5.56, I found it less increase then that. Yet with a more notable decrease in felt recoil. Grendel is jumpy, and this took it down to nearly 5.56 level recoil. I wasnt sure if it would, since the .300 BO version is less efficient than the longer tighter 6.5 version, but actually it worked pretty good.