I'll agree with Texan Scott except on one point - the effective range. I can (and have more than once) taken coyote out to 125 yards.
My preferred lever rifles are all "Trappers". That is to say they all wear 16 in barrels. And all my Trappers (44-40, 44 mag, 357 Mag, 45 Colt, and 30-30) are easily effective out to that range and often times more.
IMO, the Trapper is probably "the most" all around useful rifle length. They're a snap to handle in the closest of quarters or heaviest bush. They're flat from side to side, light enough and short enough that they're easily stowed in among the gear, packed, carried in a scabbard, etc. and offer excellent close in ballistics.
Its no wonder why Trappers in the 19th Century preferred them.