Depending on barrel weight and taper You may or may not experience much or no divergence with or without it.
I would think that POI may shift a bit though not certain. . .
If you work up a great load with it installed then remove it, you'll quickly know.
Let us know what you learn?
Question: I'm thinking of getting one but have a concern.
How much of a brake can be used?
I think there would be no problem with the Holland QD on the 270 AM, but that huge APS Painkiller on the 375 may be a deal breaker. The thing is about 4" long and 3" wide.
And I'm not about to lay down behind that sucker w/on that brake installed!
PS: how big of a barrel diameter can it handle?