If they group tight but are that far off it's a tune thingy. If they're low left and not grouping worth a flip it's probably a spine problem. That of course is assuming your field points group well. I agree, it all begins with paper tuning. If you can get bullet holes you won't have problems with broadheads if it's the right arrow. I tuned my broadheads for this year back in June so I wouldn't have to worry about it the night before the season. I rechecked them a couple weeks ago.