With a 1:10 twist, you can stabilize up to 200gr bullets. You can't really over-stabilize a bullet, at least not easily. As the twist increases, more energy is taken from propelling the bullet forward and put into spinning it. So shooting an excessively light bullet in a short twist is inefficient, though I don't know how much of a difference it makes.
My .308 has a 1:10 twist, and I've been shooting 168/175/185 grainers.
Cant over stabilize a bullet easily ? my 7rem has a 1-9 and it wont shoot 168's ... Its " over stabilizes " them , Drives 180's in a Canadian quarter at 300 yards.