Yup, Beretta customer service is terrible. I wont buy another Sako/Tikka/Beretta product again because of my experience with them. If you got a good shooting Tikka, that's great, I would hold on to it and take care of it. I would never buy a Christensen either because of the things I've read about them.
If you're not shooting any farther than 600 yds then you dont need a 300 RUM. The only reason I have a RUM is for 1K shooting. A 300 WSM uses a lot less powder, barrel will last a lot longer and it has a lot less kick than the RUM and it will get you to 700 yds with most loads at sea level and with a good load it will get you to 900 yds. If you want more, than go with a RUM and if you go with a RUM, get a Sendero hands down. My first choice for the 300 WSM is the Sub MOA Vanguard. Next choice would be a Savage. You might get a good Sako 85, A7 or Tikka but for me it's too risky and I wont go that route again.
I love my NF scope. For LR hunting, it's the best way to go IMO. There are some other good ones, but for the money, nothing comes close.