I am also running pretty heavy setups. I am shooting .400 spine D6 carbon arrows with 100gn insert/outsert and 200gn heads out of my 50lb Elkheart for 630 total gns. I ran this same setup last fall for bears over bait here in MI, but with 250gn heads for 680 total gns. I wanted to go a touch lighter for whitetails for a little added range. I shoot the same arrows for 3D, but in .500 spine with 100gn points for 485 total gns. 3D season is pretty well wrapped-up by this time of year, so that gives me a good six-plus weeks to recalibrate. Shooting different bows for each 3D and hunting helps too.