Myself and a hunting buddy have used them for the past few seasons.I started out with the hammer head and went to the miniblaster.Between the 2 of us we' ve killed about 15 deer with them.No lost or wounded deer.The wound channels on soft tissue are devastating.They are pretty much a one shot head,I' ve never had much luck changing the blades.My buddy is at about 62 ft/# ke I' m more like 57.
I' m only shooying about 250 fps and never any issues with the head opening.That being said I plan on swithcing to a muzzy this year.We have hogs on our place now.I would' nt want to shoot a hog with a miniblaster and my KE.For deer sized game they have worked fine,just not very durable.BTW shot thunderheads for years,one fine BH just don' t like the o ring set up.Chris I think your tests do have some value for refference,keep up the good work.Maybe some ballistic gelatin testing of wound channels like they do with bullets?I' d be willing to make a donation to help cover costs.

CB