OK, I’m going to bring up a couple of things that no one else has mentioned. Please don’t take my comments as mean or discouraging. I just want to relate my own experiences with bitless riding. I have ridden numerous horse’s of my own with hackamores and sidepulls in addition to bits. I like trail riding bitless if possible and have done numerous endurance and CTRs bitless. HOWEVER, a bitless bridle, especially those without a curb chain can also allow a horse to bolt out of control or lean and pull you along like a water skier. These take training! of horse and rider.
You know the saying that the problem is between the reins and the saddle? This is so true.Always consider if you the rider is the cause, then consider equipment. I suggest you learn how to do a true one-rein stop and teach it to your horse. Practice it, over and over, at all gaits. This is important to your safety and your horse’s safety as they can just pull right thru a side-pull, jumping hackamore, cross-under bitless without the needed training. Been there, done that!
I have successfully competed in mechanical hackamores. I originally started with a Little S hackamore but switched to a well designed “English” hackamore. The little S hackamore chain sits too high on the jaw bones while the english hackamore sits lower and the curb chain can hang just above the horse’s chin in the “curb chain groove”. I found my horse’s were more responsive and settled in the english hackamore and I can direct rein them well and do a one rein stop easily. I teach my horse’s a one rein stop then teach them to listen to a “suggestion” of the ORS. If they start to lean or get strong I just do a beginning of the ORS, just a little bend to the side and they have learned to lighten up and I will give a quick release.
There are sooo many bit designs out there. My preference is for the Myler line of bits. I have had a couple of horses that seemed to despise bits. I just hadn’t found the bits that were right for their mouths and had to also improve my own riding. STB’s are trained to lean and pull into their bits. I rode an off track STB when I was taking lessons as a teen and had to learn that I couldn’t hang on her mouth. I do like Myler Kimberwickes and many horses respond nicely and in a different way to a smooth wide flat curb chain. This type of bit may be just the thing for a horse that was trained to lean into a snaffle.
Just suggesting that you be sure about having training and control in place before heading out with extremely mild equipment. You do want to have the tools in place to stop a bolting/runaway horse, just in case.