I agree, speed deffinetly isnt everything. If that arrow hits where it is suppose to its gonna do the job. My suggestion would go somwhere in the middle, you dont want a 600 grain arrow shooting 180fps and you really dont want a 300 grain arrow shooting 330fps. Im shooting a 375grain arrow at 300fps but I would go any lighter than that. Somewhere around a 400 grain arrow should be about perfect.