I like vortex mini max , or marden heads . You can get them from 1 1/2" to 21/2"s of cut depending on the energy you are putting out . The 1 1/2 " cut 2 blade head they have would be the only mecanical head I would recomend for someone shooting under 55 lbs .The other reason I like them is I and several hunting buddies have had great sucess for years with them , so they have proven themselfs to me .