I had an m30 pro on my 300 wsm
. Truth be told I really like it, the turrets are very reliable and accurate. The level in the scope does work if your scope is mounted on a level gun. The warranty is awsome if you have a problem with it, take it back to the dealer for a swap on site for a new scope.
The parts I dont like. I have had to use the warranty four times. The recoil from my 300 wsm is to much for it. I will have particales adhere to my lens from inside the scope, blocking the reticle. Very annoying. It now sits on my 243 and it works great.
Would I buy another one? Yes, but I would not put it on anything bigger than a 308.