SS,
The factory sights wont get it done on these guns. You'll probably end up changing the back sight, or putting on a lower front sight, unless H&R has finally figured out the sights aren't right, and added a higher rear sight!
Mine shot 6" low at 100 yds, with the adj. all the way up.
I found the weight to be a tad too light, but I fixed that by removing the buttplate, and filling the hole in the stock with #8 bird shot. Then replace the buttplate with the shot slightly heaped, and it will keep it compressed a bit. That added about 16 oz. to the weight, and made a nice difference.