I use with great success fixed broadheads.
Out of 100 stalks I say a 1/3 end up being longer shots. I haven't had any problems as I tune the arrow to the bow.
That said, I subscribe to the two holes theory. For that reason I use single bevels. This year I'm trying out tooth of the arrow. Only taken a mile deer this far.
Prior I've used iron wills, works great. Tuffheads, ozcut are good too.
The key is tuning the arrow to the bow.
Starting with the proper spine for the set up, the arrow weight, arrow profile ( I use 4mms), helical fletched etc. I match the weight to what speeds I'm looking to get, and look for the speeds I need to at certain distances that I find while out hunting.
There's more than just the broadhead at play.
Another tuning tip is make sure the vanes are bigger than the broadhead they are suppose to steer. I personally use smaller vanes, but I use a right helical and go with smaller profile broadheads. I'm looking for pass throughs. Larger cut broadheads CAN have a harder time with penetration. Especially for elk and even more so at distance.