Just harvested another one yesterday late afternoon with a Spitfire, 3 blade mechanical. Worked absolutely perfect. Passed through like a hot knife through butter. Immediate blood and good blood trail to the end. Did not make 100 yards even though my hit was a shade farther back than I would have liked. That is 5 for 5 with no problems. If you prefer mechanical, don't see how you could go wrong with the Spitfire.