I could tell you a story about my experience with an ornery Mark V Accumark in .257 Weatherby, that has been an ongoing battle for the last 6 years, but I recently won my battle, after hundreds of rounds, lots and lots of money invested, and lost alot of money in doing so. I traded it in for a new rifle (Remington 700 5R Milspec .300WM). Best thing I've done in 6 years with that rifle...
Won't be owning another one.
Don't you love how their Sub-MOA vanguard rifles (inexpensive line) have a sub-MOA guarantee...But their $2,100 Accu-mark (it has accuracy insinuated in it's name) only has a 1.5" accuracy guarantee...
That's lovely isn't it?