^^Agreed. If he isn't as responsive as he should be, then slapping a stronger bit on him is not the answer. IMHO, if he isn't completely solid, soft, and responsive with the basic cues in whatever bit you put him in, then he is nowhere near being ready to start the barrel pattern. If he is hard in the snaffle, he will seem to be more responsive in the stronger bit............for a while. But it doesn't take long for the same old problems to show up again and get worse quickly, resulting in the "need" for an even stronger bit. It is a vicious cycle that will result in a horse that blows through every bit that doesn't use pure pain and damage to stop him. By that point, the damage is already done and it may be impossible to get him soft in anything ever again. I see it all too often on barrel racers around here. "He runs through the snaffle so I put him in a curb but then he started to run through that so I put him in a twisted snaffle but then he started to run through that so I put him in a twisted gag but then he started to run through that so I put him in a double twisted wonder bit but then he started to run through that so I put him in a mechanical hackamore but then he started to run through that so I put him in a double twisted gag combo chain nose hackamore but now he's running through that. What bit should I put him in now to get him to be responsive?"
If someone had told that rider to get him responsive in the snaffle, all that trouble and pain for the horse could have been avoided.