Correct then can damage scopes. My 378 wby has killed 3 Leupolds including a Mark 4 30mm LR.
My new 378 has no brake and wears a a new Nightforce 2.5x10x40mm NXS
had to laugh, thinking back...the first time I tried to sight in my 378 wby (no muzzle brake)the only spare scope I had was a 30 plus year old weaver 4x , I bore sited it then went to the range and set up a target at 25 yards the first two shots were virtually touching , I looked thru the scope to fire a third shot and it looked a bit blurry ,
I really did not pay a good deal of attention to that little detail until I found the front and internal lenses on the bench after the third shot 
