are the broadheads grouping but away from the field points? Maybe need to broadhead tune? Perhaps arrow spine? Need more details.
Wasp makes a Rack Attack and Queen models, that come in 75 grains, and a Hammer SST that comes in 75, 85, 90, 100, 125 grains.
Magnus Stinger 4 blade has 85 grain....another good COC broadhead.