Ashke and I started with an eggbutt snaffle, progressed to a D-Ring snaffle, and tried a French Link, loose ring snaffle. He hated all of them. Wide gaping mouth, head thrown up, no contact and a lot of fighting. I began to do research.
I ended up buying a Raised Rockin' S snaffle bit in the 4.5" size.
However, it was always a fight to get him to carry himself correctly and not pull on my arms. I always felt incredibly tired after a ride. It was also illegal for me to use in the dressage ring (not that I am going to show any time soon). Finally, I had zero control at the canter. ZERO. I decided I needed a bit I could use one hand with - ie, some type of western style bit - so that I could maintain some control with my right hand while holding on with my left (so ashamed. :(
At a local feed store I found:
Myler Level 2 Comfort bit with a 2" shank. We love it. It finally gives me the control I need to stop his bolting on the trail. And it gave both of us the ability to canter without feeling out of control. In a 4.75" bit.
In fact, I liked it so much that I bought a second Myler bit for dressage.
He gives nicely to the pressure and foams like a rabid dog.