Shot my farthest deer with the carbine 200+ yds with 180 round nose bullets. Don't worry about a few inches of barrel. Mine is very accurate. If YOU can shoot it, it will handle reasonably long shots if presented even though it is not the gun you might pick if you knew you would get a long one.
i have found no difference in accuracy with carbines and rifles. if anything, theoretically the carbine may be more accurate due to the fact that it is free floated and shorter barrel would be stiffer but you probably wouldn't notice it. i have rifles and carbines and much prefer the carbines. get the trigger cleaned up a bit and it will shoot better than most people can.