Scope is fine but I opted for more power and larger tube and went with a Bushnell Tactical Elite 6-24x50 with the FFP and G2DMR. Make sure it is mounted securely with heavy, 4 bolt per ring, rings and a one-piece mount. I would stay away from the picatinny rail submount with rings and go with a solid mount that bolts directly from scope to action with as few parts as possible. I torque and retorque regularly. I bedded the mount in blue loctite. Torque the action as well making sure your barrel has a good float, several business cards thick.
A RUM without a brake will take all the fun out of shooting. I don't have a brake on my 300 mag but will with the next barrel. I suggest you start with 190s or larger projectiles and h1000 and go up from there. A lot of people shoot 208 Amax loads. I've tried SMK 240's @ 2,700fps and without a brake, it feels like you should call the EMT after every shot. They do group though. Measure your free bore from the start instead of screwing around like I did. I now load .020 off the lands and that translates into a COAL of 3.521 with 190 SMKs. The 240's are a little longer due to the projectile profile. I don't recommend loading the clip unless you are hunting and then use crimped bullets. Bouncing around in the clip without a crimp could turn your loads into components or stubs. Even then, I had a remington 150gr core loc come apart after the projectile was shoved into the case and the powder drained out around it. I doubt this happens often.