I wish I could like some of the posts within this form a thousand times over! I totally agree here that bit is excessive in my opinion. Any horse with the right training should NOT need a bit like that. I personally would not do that to my horse! A lot of barrel racers seem to assume they need a bit like that to run barrels in the first place! WRONG. Maybe the horse needs a less harsh bit like that, fine I do understand. My gelding can run in a hack! Or even a snaffle. Again, the training comes into play. I would just not go with the twisted mouth and maybe try a less severe bit. JMHO.
For cattle work (we did a lot of team penning) I used a basic low port curb bit (no joints - VERY basic) as he went better on cow aids that way.
The concept that you need a harsh bit to run barrels is simply NOT true. Using a more complicated bit on a fully trained horse where you are refining the aids is one thing. Using a complicated bit TO TRAIN a horse is another - and a very WRONG option in my opinion.