Thus far I have had the best luck with NAP Spitfire XP 100gr.
No failed openings. No broken blades. Devastating wound channels.
I have seen a rib cut into, like a laser beam slit it.
All hits have passed all the way through deer, and stuck in the ground.
Arrows with the Spitfires fly true, like field points.
I have tested the NAP Spitfire XP for durability against other quality mechanical broadheads against racks of beef ribs, and found them to be the most durable.