You want a bit smaller cutting diameter as you would on a deer, or a bit smaller. and stick with fixed, cut on contact heads. Ive taken them with mechanicals, but have also lost several by using mechanicals. Ive never lost a one with any fixed head ive ever used. Ive shot them with muzzy three blades, slick tricks, monotec G5, tekke three blades, sonics, liberty two blades, old bear three blades,and eagle two blades