I know that Killzone the 2.3" expandable broadhead has some issues with penetration but they put a heck of a hole in an animal. Even with a heavy arrow and draw weight. Read some online reviews prior to buying anything.

I've killed a ton of deer over the past 15-20 years with NAP Thunderheads. Today, with small 2" fletching, I find the 100 grain heads fly beautifully. Back in the day with 5" actual feathers I used the 125gr heads. They are durable, and lethal.

Been shooting Slicktricks and QAD exodus for a few years. Never any problem with flight path as long as I paper tune my bow, walk back tune, and spin tune my arrows. Everything has flown true out to 70 yards. Coming from a 525 grain arrow all I have are pass throughs. Picture below left is a hog shot with 125 grain Exodus and right is 125gr Slicktrick magnum. If you want to know how the holes look.

I have benn shooting 100gr Thunderheads since way back. At that time there were no mechanicals. I shot a lot of heads before landing on the Thunderheads and for me they fly like my field points and stuff does not run far. Anyone getting rid of Thunderheads, I'll take them.