Most accurate -
Rem. 700ML followed very closely by a T/C Omega - both would give sub-MOA groups with a variety of loads.

The worst -
Anything with the name Traditions on it! I've had everything from a .32 cal sidelock to an inline and none of them would shoot decent groups consistently!

The best -
T/C sidelocks. Good accuracy, easy to clean & care for, and dependable with reasonable care & loading. + just plain fun to shoot!