Sorry guys, but it is pretty simple to tune a bow to shoot Bullheads. I'll give it to you that some bows can be more difficult to tune than others, for many reasons, but they can ALL be tuned to shoot a Bullhead. I know that my old Mathews Outback was beyond easy to tune for Bullheads. I got them to hit with field tips and 125 gr. broadheads within about 6 shots using the Victory arrows. With my Elite Z28, it took more effort. Why I'm not sure, but after messing with the bow and set up for a couple days, I got them to tune in very close. To the point that at 20 yards I settled in at Bullheads an inch or so left of my field tips. I just moved my sight over a tad and I can now drill a water bottle at 40 or more yards nearly every shot. In a lot of situations, you can't tune the set up in 10 minutes one day. When I tune a bow I generally do it over a period of 3 or 4 days. I like to pick it up with fresh muscles. When my arms get tired, then it is me making the mistakes, not the bow. I also like to average it out over days because lets face it, we all have an "off day". Every once in a while I get a day where I'm yanking shots and it is me, not the bow. So you have to spend time tuning any set up and especially spend time when making a whole sale change to a large head chop broadhead, possibly heavier broadhead, and longer arrow system. You have to decide if you are willing to commit to a head chop set up or not. It isn't for everyone. It is easier for some and some set ups. BUT at the end of the day ... 99% of the bows can be tuned to shoot these heads effectively.
Mike said it best, bow hunting birds is a very short range game. If I want to shoot a bird at long ranges, I have a shot gun for that. Like he said, take a look at MOST of the Bullhead endorsed videos that many of us affiliated with Magnus have produced. The one common denominator is birds "in your face" close. 10 yards or less. I've gotten to the point now where I set decoys at about 6 to 8 yards. I want birds that close. It makes for an easy shot, great video, and heart pounding excitement.
You say ... "I can't get birds that close." To which I say ... "YES YOU CAN!" It takes 3 things to put birds in the decoys at 10 yards or less. #1 Scouting. Know where your turkeys are most likely located and where they will have the highest chance of coming from. That helps you with #2. #2 Decoy Placement. A tom turkey will generally hang up if he sees that another turkey is facing him. He likes to wait a turkey out and have that turkey come to him. So place your decoys looking AWAY from where you think a tom will have the highest probability of approaching per your scouting. If he could come from any direction, then face the decoy directly at your blind. When he sees the "other bird" facing away from him or not directly at him, his natural reaction is to make that bird see him, so he will want to approach that decoy to get in his face. #3 QUALITY DECOYS. I know there has been tons of debate as to what is "needed" to kill a turkey when it comes to decoys. Foamies and low end dekes will kill birds all day long with a shotgun when a bird hangs up at 30 yards. I've been there, done that. Once in a blue moon a tom will get fooled into bow range close over a foamie or low quality deke as well. BUT, if you want to CONSISTENTLY put birds in the decoys and hold them in the decoys then you must use an "ultra-realistic" decoy. Hands down this leaves you with 3 options ... A stuffer (pain to carry, easily damaged, not good in the rain), a Zink (limited in poses, look better than most, semi collapsible), or DSD. Hands down, DSD's are the most realistic, durable, and offer the best variety of poses that is available to us as hunters. DSD's work almost every single time when it comes to putting birds into the decoys. In the 4 years (since they were introduced) that I've been hunting over DSD turkey decoys, I've only ever had one tom skirt the decoys. In every other instance, whether it was my bow hunts, a youth hunt, a gun hunter, private ground, or public ground ... if a tom even sees the DSD decoys, he comes right to the DSD decoys.
I'd encourage anyone frustrated with set up of the Bullheads or bow hunting birds in general to get in touch with one of us affiliated with Magnus Broadheads. Woody Sanford at Magnus is the guru on Bullhead tuning. He's seen every possible scenario and will work with you through your issues. Others of us are willing to give all the advise in the world on how to put birds at 10 yards or closer. We are here to help.