I put new rings and a new scope on one of my most accurate rifles about a month ago. At first it shot well but then last time out by the end of the session the groups started opening up so I pulled the scope off.
The front base (Talley LW 1-piece) was loose. First time I've had one come loose so I'm thinking I must've had a brain fart and not tightened the bases all the way when I put them on. I'm usually careful about that, use a torque wrench, etc. This is not a hard kicker either, .260 Rem.
People always say the rings/bases are the first thing to check out when groups open up but like I said I've never had it happen before.
So my question is, how common is this? Has anyone had this happen when you're sure you tightened the bases right, or is it almost always operator error?
