Ironically, moving up to a heavier arrow was in part for the improvements to my close range aiming. With a long draw and my facial structure, getting a PO under 30-35 yards was tough without going to a pretty hefty arrow. Tried everything else, then moved to weight. Out of 45# bows, I get about 25-30 yard PO with the 650+ gr arrows, which works pretty well for the close range hunting, target, and 3d that I enjoy. The quiet shot and stable arrow flight were a nice bonus, as well as the tougher arrows that comes from a heavier spine shaft point-loaded to match. I had avoided these extra-heavy arrows for years thinking that accuracy could be improved with a lighter, faster arrow and while that's true when distances get past 25 yards, the truth is that I simply don't have any interest in shooting past that on game and that's my primary focus.
Hitting the heavy bone threshold was a secondary goal for confidence more than anything, and it's not a particularly unreasonable arrow weight having shot 600+ gr arrows for most of my teens. Hunting in a somewhat suburban areas usually makes me nervous and some of my shots drifted too far back, worried that tucking too tight to the shoulder would lead to undesireable contact. Liver hits work but took much longer than I'd prefer. These heavy, Tuffhead-tipped arrows give me confidence and also fly phenomenally. As they say, shot placement is paramount so from my perspective this kind of combo offers that in numeruos ways.