I used mausers when I first started "rollin my own" guns because they were cheap. Turks and VZ24s at BIG 5 were $49.00. I never used commercial actions , but I did a .220 swift, 2 25-06s, 338-06, and a 458 Win Mag with Adams & Bennet barrels that all were MOA; the Swift and 1 25-06 were 1/2 MOA with pet loads. I used a Shilen on a 243 that was always 1/2 moa or less. The mauser is VERY reliable and can be made smooth and beautiful. You should stay with standard cartridges because the mags and short mags can cause feeding problems if you dont get the rails milled right.
Here comes the bad part. You no longer can build these cheap. Actions, barrels, triggers, and safeties have all gone up to the point where you may be in the same $ range as a used Rem 700 or Savage. Even worse is if you ever decide to sell it you will always get "Nice gun, but nobody wants a mauser".
A mauser 98 is all a bolt gun should be, and if you plan on keeping it be not afraid; but be prepared to show your groups when someone pokes fun at it because it will happen.