A LOT of BCs shoot low, the problem is H&R puts the wrong front sight on them, the .584" 17a Lyman sight is too tall, if you're seriously considering shooting long range, buy a .404" 17a sight for it, mine hits 1½" high at 100yds with the FP-TK sight bottomed shooting at trapdoor 405gr velocities. Bernie has used his for 400-600yd shooting 500gr at 1500fps. If you want to use the WGRS sight or aren't interested in shooting long range, get a .494" 17A or you could have H&R replace the .584". Another option would be to upgrade to a better sight, maybe one with a spirit level. Removing the front sight is covered in the FAQs.
Tim